Tea is Good for You
Hardly a week goes by without news of yet another research study confirming the health benefits of tea. Here's a summary of the recent findings.
Major study links green tea with less disability among elderly
A major Japanese study has found that senior citizens who regularly consume green tea are more agile and active than non-tea drinkers. Almost 14,000 individuals aged 65 and over took part in the three-year experiment. Scientists focused on whether green tea drinkers have a lower risk of frailty and disability as they grow older. They found that those who consume at least five cups of green tea per day were one-third less likely to develop 'functional disability', or problems with daily activities, such as dressing or bathing. Even after adjusting for confounding factors such as diet and lifestyle habits, the link was deemed significant. Although reasons behind the findings remain unclear, researchers point to a study that suggests that green tea extracts seem to boost leg muscle strength in older women.
Reuters, Feb 2012
Green tea shows promise as an allergy fighter
"The wonder cup just got even more wonderful. Green tea, rich in antioxidant treasures that protect against heart disease and cancer, now shows promise as an allergy fighter. In laboratory tests, Japanese researchers have found that the antioxidants in green tea, block the biochemical process involved in producing an allergic response. Green tea may be useful against a wide range of sneeze-starting allergens, including pollen, pet dander, and dust."
Prevention, April 2003
Green tea compound may stop spread of Alzheimer's
Breakthrough research suggests that green tea may be able to prevent the spread of Alzheimer's disease in the brain. A new study from the UK found that a compound abundant in green tea called epigallocatechin galate, or EGCG, is able to disrupt a key step of Alzheimer's disease pathway, preventing it from progressing. EGCG was shown to neutralize the effects of a specific type of protein that latches on to nerve cells in the brain and ultimately causes those cells to die. The antioxidant altered the shape of the protein compounds, preventing them to attach to the nerve cells. Scientists claim this is an important new lead in the search for new and effective treatments for this yet incurable disease.
Examiner, Feb 2013
Drinking Green Tea Protects the Brain
Regularly drinking green tea could protect the brain against developing Alzheimer's and other forms of dementia, according to latest research by scientists at Newcastle University. Two compounds are known to play a significant role in the development of Alzheimer's disease -- hydrogen peroxide and a protein known as beta-amyloid… Previous studies have shown that compounds known as polyphenols, present in black and green tea, possess neuroprotective properties, binding with the toxic compounds and protecting the brain cells.
Science Daily, January 2011
Chemical in Green Tea May Fight Alzheimer's
Research shows green tea has many health benefits, especially as an antioxidant. Ingredients in green tea helps prevent the formation of B-amyloid, a protein whose accumulation is recognized as causing Alzheimer's. Drinking green tea can help with relaxation and concentration.
South Bend Tribune April 13, 2010
Green tea and laser show promise in fight against Alzheimer's
Scientists have discovered a novel way to fight Alzheimer's disease using a mix of green tea and red light. The laser light pushes water out of the cells and when the laser is switched off, the cells absorb water and any other molecules, including drugs, from their surroundings. The combination of green tea and red laser light was found to destroy Alzheimer's plaques that crowd the brains of people with the disease. Researchers from Germany bathed brain cells with EGCG, an extract found in green tea, while stimulating the cells with red light. This method reduced the amount of plaques that cause loss of memory and other symptoms by 60 percent.
New Scientist, Nov 2011
Green tea may be useful in controlling inflammation from injury or diseases such as arthritis.
Tea contains compounds that may help reduce inflammation and help arthritis. Scientists at Case Western University in Cleveland took two groups of mice and gave them injections of a substance that causes immune reactions similar to those due to rheumatoid arthritis. One group had regular water to drink and the other got water laced with polyphenols, chemicals found in green tea and, to a lesser extent in black tea. Nearly all the mice that drank regular water got arthritis-like symptoms, compared to less than half of the treated mice.
Boston Globe, April 26, 1999
Green tea reduces inflammation in arthritis patients.
Green tea catechins are chondroprotective and that consumption of green tea may be prophylactic for arthritis and may benefit the arthritis patient by reducing inflammation and slowing cartilage breakdown.
The Journal of Nutrition, Mar 2002
Arthritis Reduced by Green Tea
Researchers found that green tea significantly reduced the severity of arthritis. The researchers suggest that green tea affects arthritis by causing changes in various arthritis-related immune responses... Therefore, they recommend that green tea be further explored as a dietary therapy for use together with conventional treatment for managing Rheumatoid Arthritis.
NIH NCCAM, Spotlight on Research 2008
Tea Suitable for Bone Health
Resarchers state that three fundamental chemicals found in green tea- EGC, GC, and GCG have a great impact on osteoblasts, or bone cells when exposed to these particular chemicals. The bone cells treated with these particular chemicals helped stimulate growth in comparison to other components. In addition to promoting growth of cells, there was significant increased in the amount of mineralization found in the osteoblasts. Natural food sources, such as tea help offer an economical solution to the management of osteoporosis.
Journal of Chinese Medicine October 2009
Tea Enhances Markers of Bone Health
Results show that consumption of GTP (at a level equivalent to about 4-6 cups of steeped green tea daily) and participation in tai chi independently enhanced markers of bone health by 3 and 6 months, respectively… Because oxidative stress is a main precursor to inflammation, this finding suggests that green tea and tai chi may help reduce the underlying etiology of not only osteoporosis, but other inflammatory diseases as well. Dr. Shen and colleagues concluded that there is a 'favorable effect of modest green tea consumption on bone remodeling in this pre-osteoporotic population' and hope to soon complete a more long-term study utilizing more technically savvy measures of bone density.
Science Daily, April 2011
Tea flavonoids may be bone builders.
Tea flavonoids may be bone builders. A report in this week's Archives of Internal Medicine looked at about 500 Chinese men and women who regularly drank black, green, or oolong tea for more than 10 years. Compared with nonhabitual tea drinkers, tea regulars had higher bone mineral densities, even after exercise and calcium-- which strengthen bones--were taken into account.
U.S. News & World Report, May 20, 2002
Green Tea Improves Bone Strength
Researchers in Hong Kong are reporting new evidence that green tea… may help improve bone health. [In a study reported in the in Journal of Agricultural and Food Chemistry, ]they found that the tea contains a group of chemicals that can stimulate bone formation and help slow its breakdown... [O]ne component of green tea in particular, EGC, boosted the activity of a key enzyme that promotes bone growth by up to 79 percent. EGC also significantly boosted levels of bone mineralization in the cells, which strengthens bones. The scientists also showed that high concentrations of ECG blocked the activity of a type of cell (osteoclast) that breaks down or weakens bones.
Science Daily, September 2009
Green tea prevents bad breath and other buccodental diseases
Latest findings suggest that green tea kills bad breath thanks to its antioxidant content. Israeli scientists found that polyphenols, a type of antioxidant found in green tea, destroy compounds in the mouth that are responsible for bad breath, tooth decay and mouth cancer. Polyphenols called epigallocatechin 3 gallate (EGCG) possess properties that can abolish bad breath by modifying sulphur components responsible for halitosis. They can also fight harmful effects of smoking by reducing oral cavities, oxidative stress and inflammation caused by cigarettes. There is an increasing interest among the scientific community in green tea as a proponent of oral health.
Mail Online, Mar 2012
Drinking tea may ward off tooth decay.
A study suggests chemicals in tea can destroy bacteria and viruses that cause throat infections, dental caries and other dental conditions. It raises the prospect of adding tea extracts to toothpaste and mouthwash to protect the teeth. It found that caffeinated green tea was the best at fighting viruses, followed by caffeinated black tea. Decaffeinated blends were less effective as anti-viral agents.
BBC News, May 20 2003
Tea may freshen your breath.
A University of Illinois study looked at chemicals in tea known as polyphenols. Experiments in the laboratory showed they slowed the growth of bacteria associated with bad breath. "Besides inhibiting the growth of pathogens in the mouth, black tea and its polyphenols may benefit human oral health by suppressing the bad-smelling compounds that these pathogens produce," according to Christine Wu in Chicago.
BBC News, May 20 2003
Compounds found in tea can stop the growth of bacteria that cause bad breath
"Compounds found in tea can stop the growth of bacteria that cause bad breath, according to researchers at the University of Illinois at Chicago. Polyphenols, which are chemical components of tea, prevent both the growth of bacteria responsible for bad breath and the bacteria's production of malodorous compounds, indicate Christine Wu, professor of periodontics and associate dean for research at the UIC College of Dentistry, and associate MinZhu. Bad breath-or halitosis-afflicts a large portion of the population. It is caused by foul-smelling volatile sulfur compounds, like hydrogen sulfide, produced by anaerobic bacteria that thrive in environments lacking oxygen, such as the back of the tongue and deep gum pockets. In the laboratory study, Wu and Zhu incubated tea polyphenols with three species of bacteria associated with bad breath for 48 hours. At concentrations ranging from 16 to 250 micrograms per milliliter, the polyphenols inhibited growth of the oral bacteria. Wu points out that the study complements earlier research in her laboratory showing that black tea suppresses the growth of bacteria in dental plaque and that rinsing with black tea reduces plaque formation and the production of acids that cause tooth decay. "Besides inhibiting the growth of pathogens in the mouth, black tea and its polyphenols may benefit human oral health by suppressing the [poor-smelling] compounds that these pathogens produce."
USA Today, August 2003
Prolonged tea consumption may reduce risk of ovarian cancer
Women who start drinking tea at a younger age have been found to benefit from a lower risk of ovarian cancer later on in life. A study surveyed tea-drinking habits of 1000 women with an average age of 59 over a period of two years. Data included daily consumption, tea type and when they first started. Results showed that women without cancer were more likely to be tea drinkers from an earlier age and, on average, consumed more cups a day than those diagnosed with the illness. Authors of the study suspect that flavonoids may be responsible for these effects and encourage the consumption of tea because of the potential benefit in preventing this common and deadly disease.
The Telegraph, Nov 2012
Green tea linked to lower risk of cancer of the digestive system
A large-scale study suggests that green tea may play a role in lowering risks of colon, stomach and throat cancers for older women. Scientists from Vanderbilt University School of Medicine in Nashville followed 69,000 women for a period of ten years and found that those who drank green tea at least three times a week were 14 percent less likely to develop a cancer of the digestive system. Furthermore, the study found that women who drank green tea for at least 20 years were 27% less likely than non-drinkers to develop any digestive system cancer. Although researchers admit only clinical studies can establish a direct link, they did account for other factors like diet, income, exercise habits and medical history in their study and still found a benefit of drinking green tea.
Reuters, Oct 2012
Green tea claimed to slow prostate cancer
A study that was presented at the conference of American Association for Cancer Research suggests that green tea may slow the progression of prostate cancer. Drinking six cups of brewed green tea was shown to lower the levels of some disease-associated inflammation. The study focused on 67 prostate patients scheduled for a type of surgery known as a prostatectomy, where the prostate is removed, and found that drinking tea in preceding weeks produced a noticeable drop in both serum prostate-specific antigen (PSA) concentrations and PSA protein expression. Researchers explain that reduction in inflammation may be an indication that green tea may also inhibit tumor growth. The study builds on previous research that suggests that flavonoids may be associated with a lower risk of developing prostate cancer.
US News, Oct 2012
Lab study finds green tea extract may eradicate skin cancer
A new lab study has found that green tea extracts may be able to destroy skin cancer cells. The University of Strathclyde team discovered that a compound found in green tea called epigallocatechin gallate, or EGCG, is able to either prevent skin tumors from growing, shrink them or even make them disappear. After one month of treatment, 40% of tumors of one type of human skin cancer were entirely removed, whereas a further 30% shrank during the same period. One reason for these successful results may be the fact that, for the first time, EGCG compounds were delivered directly to the tumors using specific proteins that target tumors' receptors for different biological substances.
The Telegraph, Aug 2012
Green tea extract 'is cancer aid'
A green tea extract may help patients with a form of leukaemia, a study says. The tea, discovered in China nearly 5,000 years ago, has long been thought to have health benefits. But the team from the Mayo Clinic in the US found it appeared to improve the condition of four patients with chronic lymphocytic leukaemia (CLL).
BBC News Dec 22, 2005
Green Tea Catechins and Cancer Therapy
DNA and RNA are binding targets of green tea catechins, revealing their potential use in cancer therapy. "The significance of catechins, the main constituent of green tea, is being increasingly recognized with regard to cancer prevention. Catechins have been studied for interactions with various proteins, but the mechanisms of the various catechins are not yet elucidated," investigators in Japan reported.
Drug Week, 8/18/06
Effects of various tea components on neoplastic cell transformation and carcinogenesis
"Accumulating research evidence suggests that many of dietary factors, including tea compounds, may be used alone or in combination with traditional chemotherapeutic agents to prevent or treat cancer. The potential advantage of many natural or dietary compounds seems to focus on their potent anticancer activity combined with low toxicity and very few adverse side effects."
Obesity, Fitness & Wellness Week, 8/12/06
Lower Risk of Various Cancer
A study conducted in Japan found that increased green tea consumption before and after breast cancer surgery was associated with lower recurrence of the cancers. Studies in China show that the more green tea participants drank, the less the risk of developing stomach cancer, esophageal cancer, prostate cancer, pancreatic cancer, and colon cancer.
Web MD April 28, 2009
Tea to Help Lower Risks of Lung Cancer
Results from research showed that both smokers and non-smokers who did not drink green tea were 5 times more likely to develop lung cancer compared to those who drank at least one cup of green tea per day. Smokers who did not drink green tea at all were more than 12 times more likely to be diagnosed with lung cancer than those who drank at least one cup a day. Green tea's cancer fight capabilities are due to its rich concentration of polyphenols, notably a catechin called epiqgallocatechin-3-gallate, or as it's more commonly known as ECGC. The studies don't change the fact that smoking is bad for your health, and tea should not be an excuse to continue smoking.
Bnet March 30, 2010
Two Cups a Day Lowers the Risk of Endometrial Cancer
After accounting for the different ways the studies measured tea drinking, the researchers found that an increase in tea consumption of two cups daily was associated with a 25-percent reduced risk of developing endometrial cancer. The association was significant for green tea but not for black tea.
Reuters, January 2010
Green Tea Reduces Risk of Lung Cancer in Smokers & Non-Smokers
[According to a new study from the American Association for Cancer Research], among smokers and non-smokers, those who did not drink green tea had a 5.16-fold increased risk of lung cancer compared with those who drank at least one cup of green tea per day. Among smokers, those who did not drink green tea at all had a 12.71-fold increased risk of lung cancer compared with those who drank at least one cup of green tea per day.
Science Daily, January 2010
Compound unique to black and oolong teas can kill cancer cells and reduce inflammation
Researchers from Rutgers University, NJ, studied theaflavin-2 (TF-2), a compound unique to black tea (and oolong), which has been shown to kill cancer cells, a process known as apoptosis. The TF-2 triggered cancer cell death, shrinking cancer cells within 3 hours of application. TF-2 appears to regulate or activate genes that kill cancer cells. In addition, it has the ability to suppress inflammatory enzymes and molecules. These results suggest that Theaflavin-2, a major component of black tea, has the capacity to help kill cancer cells through mechanisms involving both gene regulation and an anti-inflammatory effect.
Molecular nutrition & food research, February 2011
Green tea lowers 'bad' cholesterol in study
A US study suggests that green tea may reduce LDL, or 'bad' cholesterol by a few points. It shows that green tea catechins, taken in a capsule or drunk in the form of tea, may trim 5 to 6 points more from people's total cholesterol and 'bad' LDL cholesterol levels. Brewed green tea was more effective than capsules, though the benefits overall were fairly small. The drink did not show any effectiveness in boosting 'good' HDL cholesterol, or cut triglycerides, another type of blood fat. The trials that lasted between three weeks and six months involved over 1400 adults who were randomly assigned to either use green tea every day, as a beverage or capsule, or be part of 'control' groups that used placebo capsules or liquids.
Reuters, Nov 2011
Tea can lower 'bad' cholesterol levels, boost cardiovascular health, reduce DNA damage in smokers and contribute to a decrease in risk of rectal cancer in women.
Researchers at the Beltsville Human Nutrition Research Center in Beltsville, Maryland, asked test subjects to eat low-fat, low-calorie prepared meals and drink five cups of caffeinated tea or caffeinated and non-caffeinated placebos that mimicked the look of tea. Levels of low-density lipoprotein (LDL) cholesterol dropped 10 percent among the test subjects who drank tea.
Vegetarian Times, Jan 2003
Black tea consumption may lower bad cholesterol levels and could one day be used to help reduce the chance of heart disease for those at risk.
Scientists with the U.S. Department of Agriculture (news - web sites) said they found consumers who drank black tea for three weeks experienced a decrease of between 7 percent and 11 percent in their low-density lipoprotein (LDL), or so-called bad cholesterol. Exactly what caused the LDL cholesterol level to drop in those who consumed tea was unknown, but tests are being conducted to determine if the beverage slows the body's ability to absorb LDL cholesterol, the scientists said. There was no effect on the level of high-density lipoprotein, or the good type of cholesterol, according to the study of a small group of individuals.
Washington (Reuters), October 2003
Green tea consumption lowers cholesterol.
The findings provide direct evidence that green tea has a profound inhibitory effect on the intestinal absorption of cholesterol.
The Journal of Nutrition, Jun 2002
Drinking Green Tea Lowers Total and LDL Cholesterols
Researchers in China studied the effect of green tea and green tea extract on total cholesterol (TC), LDL cholesterol, and HDL cholesterol using a meta-analysis of 14 randomized controlled trials. Green tea consumption significantly lowered the TC concentration significantly lowered the LDL-cholesterol concentration. Analyses showed that these changes were not influenced by the type of intervention, treatment dose of green tea catechins, study duration, or individual health status.
American Journal of Clinical Nutrition, June 2011
Green tea may help protect HIV patients' cognition
New research suggests that compounds found in green tea and chocolate may help prevent cognitive impairment experienced by patients with HIV. A study by a research team at Johns Hopkins University discovered that plant polyphenols known as catechins found in green tea might be responsible for encouraging survival and growth of neurons in the brain. Catechins seem to stimulate the production of brain-derived neurotrophic factor, which is a protein that is active in areas of the brain vital to learning, memory and higher thinking. HIV patients have lower levels of this protein compared to healthy individuals. The fact that catechins easily cross the blood-brain barrier increases their therapeutic potential and offers hope of the first neuroprotective treatment for cognitive impairment for people with HIV.
Psych Central, Aug 2012
Women Who Drink Tea Are Less Depressed
Tea drinking… seemed to lessen depression. Compared with the 1,216 women who did not drink tea, among the 183 women who did, depression risk was about 36 percent lower. The vast majority of the tea drinkers -- 90 percent -- drank green tea.
Reuters January 2010
Elderly Tea Drinkers Are Less Likely Depressed
Elderly people who drink several cups of green tea a day are less likely to suffer from depression, probably due to a 'feel good' chemical found in this type of tea, Japanese researchers said. Several studies have linked drinking green tea to lessening psychological problems and Dr. Kaijun Niu, of Tohoku University Graduate School, and colleagues found men and women aged 70 and older who drank four or more cups of green tea daily were 44 percent less likely to have symptoms of depression.
Reuters, December 2009
Green tea catechins found to benefit skin following UV damage
Scientists from the UK have discovered that green tea compounds called catechins may help protect the skin against sunburn and the long-term effects of UV damage. The study was performed on 14 healthy human subjects with fair skin and involved taking green tea catechin supplements for 12 weeks. The dose was roughly equivalent to two cups of green tea. The effects of the supplements were tested before and after supplementation by exposing buttock skin to UV rays and quantifying the level of sunburn. The results demonstrate that catechins may contribute to skin protection against sunburn inflammation and potentially longer-term damage caused by UV rays, and may therefore be a complement for sunscreen.
Nutra Ingredients USA, Jan 2013
Green tea can help with skin care
Green tea contains amino acids, Vitamins B1, B2 and B3, Vitamins C, E, F, P and U, and several different minerals. Of course, all of these promote good health but the specific ingredients that make green tea good for skin care treatment are polyphenols natural chemical substances found in plants, and thought to be very high in antioxidants. What can anti-oxidants do for you? The major benefit is that they kill free radicals, those nasty little cells that can cause cancer by altering the DNA. Including skin cancer. So, any product you can get your hands on that includes green tea might be beneficial.
July 2007 The National Skin Care Institute
Sun Damage Repaired by Green Tea
Antioxidants found in green tea may help repair DNA damage caused by sun exposure, according to a recent study in mice. The study, [published in the journal Cancer Prevention Research], examined the effects of polyphenols from the leaves of the green tea plant, which are thought to fight free radicals (highly unstable molecules that can damage cells) and have anticarcinogenic activity.
NIH NCCAM, Spotlight on Research, February 2010
Study links country's black tea consumption and diabetes risk
According to research backed by Unilever, owner of Lipton and PG Tips tea brands, countries that have a higher consumption of black tea also display a significantly lower prevalence of diabetes among their populations. Scientists studied black tea consumption in 42 countries and compared it to data from the World Health Organization on each country's rates of respiratory, infectious and cardiovascular diseases, as well as cancer and diabetes. They found that, on average, a population that consumes double the amount of black tea has about one quarter less cases of diabetes. Ireland had the highest annual consumption at more than 2 kilograms per person, closely followed by the UK and Turkey. South Korea, Brazil, China, Morocco and Mexico were at the bottom of the list. Researchers admit that this study does not establish a cause and effect relationship between the two variables, but claim that the scope of the study and the robust statistical relationship will pave the way for further research.
Nutra Ingredients, Nov 2012
Green tea and grape seeds help control blood sugar
Data from Linus Pauling Institute suggests that green tea and grape seed extracts may act as plant-based alternatives to control blood sugar levels. They appear to inhibit actions of specific enzymes that are responsible for carbohydrate digestion, thereby controlling sugar levels and reducing the risk of suffering from cardiovascular or neurological complications. Scientists suspect that a specific catechin present in tea and grapes, called Epigallocatechin gallate or EGCG, may be responsible in large part for beneficial effects. Four percent of Europe's population, or 19 million peolpe, suffer from illnesses associated with type 2 diabeted. In the US, almost 24 million people live with diabetes, equal to 8 percent of the pupulation.
Nutra Ingredients USA, Jul 2012
Tea can cut risk of type 2 diabetes
A study of European populations found that drinking tea was an effective way of reducing the risk of developing type 2 diabetes. It discovered that countries whose citizens are heavy tea consumers and drink at least four cups of tea per day have a 20 per cent lower risk of developing the illness. German scientists working on the study suspect that this beneficial effect may be caused by polyphenols contained in tea. They may lower the risk of type 2 diabetes by influencing glucose digestion, glucose uptake, and by protecting beta-cells from free-radical damage. The research was carried out in 8 European countries and included over twelve thousand type 2 diabetes cases. Average European tea consumption ranges from four daily cups in the UK to none a day in Spain.
Times of India, Aug 2012
Green Tea Can Help Senior's Eye Health
Researchers in Hong Kong have discovered that seniors who consume green tea refreshment may also enjoy better eye health. Results of the research state that green tea consumption could benefit the eye against oxidative stress, due to the catechins, an antioxidant, found in green tea. This antioxidant can be absorbed by the lens, retina, and eye tissue.
Retirement Homes April 21, 2010
Green Tea Can Aid in the Prevention of Glaucoma
Researchers have found that the catechins in green tea are one of the many antioxidants that have been found to protect the eye from certain diseases, including glaucoma. This antioxidants is absorbed into the tissue of the eye after passing through the gastrointestinal tract and the retina is shown to absorb the highest amount of catechins.
Journal of Agricultural and Food Chemistry April 21, 2010
Is Tea is Healthier than Water?
Drinking three of more cups a day is as good for you as drinking plenty of water, and it may hav extra health benefits. Experts believe that flavonoids are one of the key ingredients in tea that promotes health; these antioxidants are found in tea and can help prevent cell damage.
Daily Nation April 26, 2010
Tea Provides the Body with Plenty of Energy for Exercise
Good news for caffeine lovers! Caffeine, including the caffeine in tea, can be the perfect complement to your workouts. Several recent studies have found that a small dose before exercising helps improve performance. Post-exercise, a few cups of caffeinated tea can help your muscles recover more quickly. It seems that caffeine may speed up the blood’s transportation of glucose to the muscles.
Health Magazine December 15, 2009
Can you drink too much tea?
The worst things that could happen from drinking too much tea, according to the integrative-medicine physician, are fluid overload, caffeine sensitivity (though green or black teas contain only 10 to 30 milligrams of caffeine per cup, whereas coffee contains 100 to 120 milligrams) or anemia (low blood-iron levels) due to tea binding with iron. So here's a hint: Vitamin C helps with the absorption of iron, so drop a wedge of lemon in your tea.
Chicago Tribune, 8/15/06
Black Tea Remedy for Food Poisoning
If you suspect food poisoning, couple black tea with a few pieces of burned toast, says Georgianna Donadio, PhD, director of the National Institute of Whole Health, a holistic certification program for medical professionals. "The tannic acid in tea and charcoal in the toast will neutralize the toxins and help you get much better very quickly."
Study suggests that black tea consumption may substantially reduce blood pressure variation.
An Australian study suggests that black tea consumption may substantially reduce the rate of blood pressure variation. The article, published in the American Journal of Clinical Nutrition, claims that drinking three cups of black tea a day alters blood pressure variation by about 10 percent. A sudden fluctuation in blood pressure can be an early warning sign of a stroke or even heart disease. Furthermore, the study used a flavanoid-free caffeine-matched beverage in the control group, which means that the results do not stem from caffeine, but from another component in black tea. The positive results of drinking black tea were noticeable from the first day and continued over the course of the six-month study.
Medical Daily, Apr 2013
Risk of heart disease lowered by black tea
A recent study found that regular tea consumption is associated with a reduction of several risk factors that may lead to heart disease. First, it was discovered that three daily cups of tea over a period of 12 weeks lead to a significant reduction in blood sugar levels and triglycerides, which are unhealthy fats. Triglyceride levels fell by 39 percent in male participants and 29 percent in females. Furthermore, drinking tea increases the levels of HDL cholesterol, also known as the 'good' type. Finally, the study suggests that tea increases the amount of antioxidants present in the blood stream, which can protect blood vessels and tissue against oxidative stress and inflammation. The tea that was tested contained no sugar or milk, as the latter may reduce the availability of polyphenols.
Fox News, Jun 2012
Study finds flavanoids may block blood clots
A recent study from Harvard Medical School suggests that consumption of flavanoids could help prevent the formation of blood clots in arteries and veins. Flavanoids are compounds commonly found in fruits, vegetables and tea. According to researchers, a popular flavanoid called rutin has the potential to prevent and treat stroke and heart attacks, as well as deep venous thrombosis and pulmonary embolism. It acts by inhibiting clot formation both in arteries and in veins, which possesses different features in both cases, thereby enabling a single agent to prevent both types of clots. Scientists plan to follow up on these findings with a clinical trial.
Nutra Ingredients, May 2012
Study hints at lower blood pressure for black tea drinkers
An Australian study found that people who drink three cups of black tea a day can lower their blood pressure by 2 to 3 points. According to researchers, although the reduction may seem small, it has a significant effect on the prevalence of high blood pressure and the risk of heart disease. The observed decrease in blood pressure is equivalent to a 10% reduction in the prevalence of both conditions and can have a major impact on risk factors behind heart disease and death. The study was performed over a period of 6 months on 95 regular tea drinkers. Previous research suggests that possible explanations for the findings may include improved interior lining of blood vessels and reduced body weight and abdominal fat achieved by regular black tea consumption.
Web MD, Jan 2012
Green tea consumption cuts risk of cardiovascular disease
A recent study carried out by researchers from Okayama University has shown that frequent consumption of green tea could contribute to lowering mortality due to cardiovascular disease. When the researchers compared tea consumption between people who drank one cup a days as opposed to seven or more cups a day, it was found that people who consumed more tea had a 55 and 75% lower risk of cause and mortality of CVD.
BNet October 2009
Tea helps fight heart problems and diabetes, review concludes
A recent review published in UK's Nutrition Bulletin found that regular consumption of black tea protects against cardiovascular complications and type 2 diabetes. Three cups of black tea per day, with or without milk, can reduce the risk of heart problems by cutting levels of bad cholesterol (LDL) and blood sugar. Two or more cups a day may protect against type 2 diabetes. Scientists attribute these beneficial effects to flavanoids, a type of antioxidant found in tea that fights excessive pro-oxidant free radicals in the body. One typical cup of black tea contains 150-200mg of flavanoids. In addition, a 12-week study of 87 volunteers found that drinking three cups of tea a day produced a significant improvement in various cardiovascular risk factors.
Mail Online, Feb 2012
Lower Your Risk of Heart Disease with Tea
[In a new study in the Journal of the American Heart association, Dutch] researchers… found: • Drinking more than six cups of tea per day was associated with a 36 percent lower risk of heart disease compared to those who drank less than one cup of tea per day. • Drinking three to six cups of tea per day was associated with a 45 percent reduced risk of death from heart disease, compared to consumption of less than one cup per day.
Science Daily, June 2010
Green tea protects kids from flu virus
A medical study from Japan shows evidence of a clear link between green tea consumption and reduced odds of catching the influenza virus. Scientists studied the effects of green tea on influenza in 2600 kids and found that children who drank five cups of green tea per week had significantly fewer cases of flu, compared to those who drank almost no green tea. Children who drank about one cup of green tea per day also had significantly fewer sick days from school. Green tea compounds catechins and theanine were found to enhance systemic immunity and interfere with viral replication. In fact, the results were so conclusive that scientists established that regular consumption of green tea is protective against influenza infections during the influenza season.
Daily Herald, Nov 2011
Tea helps fight infection
"The [study] results gave clear proof that five cups of tea a day sharpened the body's disease defenses, said Dr. Jack F. Bukowski, a researcher at Brigham and Women's Hospital in Boston and Harvard Medical School. Dr. Bukowski and his co-authors isolated a substance called L-theanine from ordinary black tea. He said L-theanine was broken down in the liver to ethylamine, a molecule that primes the response of an immune system element called the gamma-delta T cell."
New York Times, April 22, 2003
Matcha green tea has many antioxidants.
For years, studies have indicated that the antioxidants in green tea offer protection against diseases, including cancer, and even fight dental cavities. One of the most beneficial of these antioxidants is called epigallocatechin gallate. At the University of Colorado at Colorado Springs, [scientiest] used the chemical separation technique known as micellar electrokinetic chromatography to analyze matcha and a green tea commonly available in U.S. markets. The researchers found that samples of matcha had 200 times the concentration of epigallocatechin gallate in the common U.S. tea. Although most green teas are prepared in the familiar way-by steeping leaves in water-matcha is prepared by mixing hot water with powdered leaves. This is probably why matcha contains so much epigallocatechin gallate.
Science News, Apr 12, 2003
Green tea helps bolster the body's defenses.
"Drinking two or three American-size cups a day of green tea helps bolster the body's defenses, especially as you age, suggests Lester A. Mitscher, PhD, professor of medicinal chemistry at the University of Kansas in Lawrence and author of The Green Tea Book: China's Fountain of Youth"
Prevention, April 2003
Green tea could fight autoimmune disorders
Polyphenols founds in green tea may help protect the body autoimmune disorders, believes an oral biologist who has conducted extensive studies into their health promoting properties. Dr Stephen Hsu, a researcher at the Medical College of Georgia's School of Dentistry, suspected that there may be a link between green tea consumption and autoimmunity after noting that dry mouth, or xerostamina, an autoimmune disorder suffered by around 30 percent of elderly Americans, occurs in only one to two percent of Chinese people in the same age group. Green tea is a common component of the typical Chinese diet. Autoimmune disorders occur when the immune system starts to attack the body's own tissues. They may be triggered by other health conditions, such as type 1 diabetes, rheumatoid arthritis, lupus and Sjogren's disease, and can have debilitating and even life threatening effects. Dr Hsu will present the findings of his latest investigations, involving green tea's role in producing autoantigens, at the Arthritis research Conference in Atlanta this weekend. Autoantigens are molecules that have useful functions, but changes in their amount or location can trigger an immune response.
Green Tea Fights Superbugs
Green tea can help beat superbugs according to Egyptian scientists... The pharmacy researchers have shown that drinking green tea helps the action of important antibiotics in their fight against resistant superbugs, making them up to three times more effective… “In every single case green tea enhanced the bacteria-killing activity of the antibiotics,” [according to the researchers].
Science Daily, March 2008
Mechanism Discovered for Health Benefit of Green Tea, New Approach to Autoimmune Disease
One of the beneficial compounds found in green tea [EGCG] has a powerful ability to increase the number of 'regulatory T cells' that play a key role in immune function and suppression of autoimmune disease, according to new research in the Linus Pauling Institute at Oregon State University. EGCG may have health benefits through an epigenetic mechanism, meaning we aren't changing the underlying DNA codes, but just influencing what gets expressed, what cells get turned on,' Ho said. 'And we may be able to do this with a simple, whole-food approach.' Laboratory studies done with mice, Ho said, showed that treatment with EGCG significantly increased the numbers and frequencies of regulatory T cells found in spleen and lymph notes, and in the process helped to control the immune response.
Science Daily, June 2011
Tea Might Protect Transplanted Livers
An antioxidant found in green tea may help protect patients recovering from liver transplant, suggests a study in mice. Restrictions in blood flow, or ischemia, can lead to complications following liver transplantation in humans, particularly if the liver is fatty, as it can be in obese individuals. But a natural antioxidant found in green tea may protect transplanted organs from ischemia-linked damage, according to researchers at the Medical University of South Carolina, in Charleston. A previous study found the simple act of rinsing fatty livers in a solution containing green tea extract helped prevent transplant failure. In their study, the Charleston team gave mice doses of EGCG, the major antioxidant flavonoid found in green tea. They then performed surgeries resulting in ischemia that threatened to injure the rodents' livers. Mice receiving the green tea derivative showed a 100 percent post-surgery survival rate, compared to a 65 percent survival for animals not receiving the compound. Tissue analysis showed that mice receiving the tea extract experienced less liver cell death and retained a higher percentage of viable tissue. Further research suggests the green tea extract acts as an antioxidant, protecting fatty livers from injury while reducing liver fat content by about 55 percent.
HealthDayNews, Feb 2005
Green Tea Improves Liver Health
A study led by nutritional scientist Richard Bruno has found that green tea can help mitigate the impact of nonalcoholic fatty liver disease. Bruno, an assistant professor of nutritional sciences [at UConn], and his research team have found that the daily ingestion of green tea blocks the amount of fat stored in the livers of obese mice that otherwise develop severe fatty liver disease; improves liver function; and reverses declines in antioxidant defenses in the liver.
University of Connecticut Advance, February 2009
Rinsing With Green Tea Improves Oral Health
The researchers used the following measurements: Streptococcus mutans count in saliva and plaque, Salivary and plaque pH values, Gingival Bleeding Index (GBI). The results of this study showed that there was a statistically significant difference among subjects pre- and post-rinsing with 2% green tea for 5 min [for all the measured variables]. This study supports the effectiveness of local application of green tea as antibacterial and anticariogenic material as it decreases the acidity of the saliva and plaque, so it is a cost-effective… prevention measure especially in developing countries.
International Journal of Dental Hygiene, May 2011
Large study links green tea with reduced risk of stroke
A large-scale study identified a reduced risk of stroke among green tea and coffee drinkers in Japan. Over 80,000 Japanese adults were followed for an average period of 13 years and those who drank four cups of green tea or a cup of coffee per day benefited from a decreased risk of stroke of 20%. Five or more cups of green tea corresponded to a 15 percent decrease in all-cause mortality, and a 26 percent decrease in dying from cardiovascular disease. Green tea drinkers' risk of intracerebral hemorrhage was also reduced by 32 percent. Although exact reasons behind the results remain unclear, scientists suspect that antioxidants are responsible for the majority of the beneficial effects.
The Telegraph, Mar 2013
Is Tea Good For Your Teeth?
Tea provides protection against tooth plaque and potential tooth decay, plus it has been shown to help strengthen bones. Tea contains flouride, which is good for your teeth. Tea is best drunk plain in order to reap benefits for tooth health.
Daily Nation April 26, 2010
Tea Can Aid in Periodontal Health
Higher the intake of tea, according to studies conducted amount middle-aged men in Japan, the more of a reduced risk of periodontal diseases, such as gum bleeding, loss of teeth, etc. Research shows that catechins present in green tea helped promote an antioxidant effect that inhibited inflammation and bacterial growth.
Life Extension, July 2009
Regular Green Tea Consumption Linked to Good Teeth
Routine consumption of green tea may help promote healthy teeth and gingivae, researchers report in the March issue of Journal of Periodontology. Investigators from Kyushu University, Fukuoka, Japan, analyzed the periodontal health of 940 men and found that those who drank green tea regularly had periodontal health superior to that of subjects who consumed less green tea.
Journal of the American Dental Assoc., March 2009
Trying to lose weight? Another benefit of green tea!!
Compared to the placebo and caffeine, green tea extract consumption produced a significant 4% increase in 24-hour energy expenditure. If you consume 2,000 calories per day and don't gain or lose weight (you're in energy balance), an increase of 4% would translate roughly into an 80-calorie daily difference. Over a year, this could result in 8 pounds of weight loss.
American Journal of Clinical Nutrition, Nov 1999
Daily intake of the tea burns extra calories
"In a 1999 Swiss study, six out of 10 men taking capsules of green tea extract burned, on average, about an extra 80 calories a day-the equivalent of 3 tablespoons of ice cream, 7 potato chips, or 1 Dunkin' Donuts Munchkin. A second study, conducted by researchers from the US Department of Agriculture, saw an extra 67 calories a day burned in men who were assigned to drink about 5 cups of tea (not green) each day."
Tufts University Health & Nutrition Letter, June 2003
Recent evidence shows that in the battle of fat loss, green tea may be superior to plain caffeine.
According to a new study, green tea appears to accelerate calorie burning -- including fat calories. Researchers suggest compounds in green tea called flavonoids may change how the body uses a hormone called norepinephrine, which then speeds the rate calories are burned.
Joe Weider's Muscle & Fitness, April 2000
Green Tea Helps Melt Off Pounds
Drinking just three cups a day of green tea seems to help you melt off extra pounds. A study by the USDA Human Nutrition Research Center on Aging at Tufts University found that participants who drank three cups of green tea a day lost twice as much weight as non-tea drinkers. A type of antioxidant known as catechins is credited with the weight-loss benefits of green tea. (Replacing a little tea brewing water with lime or lemon juice can help your body activate even more of the tea’s catechins.)
Rodale.com, June 2010
Green Tea Component Helps Decrease Body Weight
This study evaluated the influence of a green tea catechin beverage on body composition and fat distribution in overweight and obese adults during exercise-induced weight loss. There was a trend toward greater loss of body weight in the catechin group compared with the control group… These findings suggest that green tea catechin consumption enhances exercise-induced changes in abdominal fat and serum [triglycerides].
Journal of Nutrition, February 2009
Green and black teas offer similar health benefits
A review of studies on health benefits of green and black teas found that both are equally effective. Both varieties come from the same plant, camellia sinensis. The difference is how the leaves are processed: green tea leaves are steamed and dried, while black tea leaves are fully oxidized. According to the researcher, studies that have looked at those two types of tea have confirmed similar improvements in vascular function, leading to significant reductions in stroke risk. The average intake in those studies was 4 cups per day for black tea and 5 to 6 cups per day for green tea (due to the smaller cup traditionally used). The study was commissioned by the UK Tea Advisory Panel.
AOL, Jul 2011
Green and black tea fight diabetes
Black tea is as good as green tea in reducing sugar levels and inhibiting cataracts in diabetic mice, researchers said Tuesday. The study by the University of Scranton in Pennsylvania found both teas reduced glucose levels and other diabetic complications, such as cataracts, during the three-month test on rats. "Most people, scientists included, believe that green tea has more health benefits than black tea," said lead author Joe Vinson. of the research to be published in the American Chemical Society's Journal of Agricultural and Food Chemistry. The finding that green and black teas are beneficial suggests the drinks could be simple and inexpensive ways for humans to fight diabetes, he said. Vinson's earlier work showed both teas equally inhibited atherosclerosis, a major risk for people suffering from heart disease as plaque builds up on arterial walls.
United Press Int'l, April 19 2005
Tea decaffeinated using a natural CO-2 process retains 90% of its cancer-fighting properties.
If caffeine is removed with a compound called ethyl acetate, only about 30% of the tea's healing polyphenols (believed to fight cancer and heart disease) remain. But if caffeine is removed using a more expensive water-and-carbon-dioxide process, about 90% of the polyphenols remain.
Prevention, February 2000
Cut your caffeine intake!
CLOSE YOUR EYES AND INHALE DEEPLY the scent of a juicy, summer peach, ready to burst. Or apple cobbler as the aroma curls out of the oven on a snowy Saturday evening. Now imagine the same experience, available year-round, coming from a cup of tea. Sip it. Love it. Luxuriate in it. And know that nowadays tea sipping can not only delight the senses, but it just might be good for your health as well. It's true. New research shows that regular consumption of tea (the world's favorite beverage, next to water) has been linked to lower risk of both heart disease and cancer. And these days, flavored teas come in an abundance of lip-smacking varieties like ginger-peach, passion fruit, apple-cinnamon, vanilla-almond and peppermint. You can drink it hot, iced and with sugar or lemon. It's flexible enough to suit every taste. Plus, it's cheap and easy to make. When we talk about tea here, we mean one of three kinds: green, oolong or black (most Americans drink black). All three come from the leaves of one plant-the tea bush Camellia sinensis. Flavored black is simply black tea that has been mixed with ingredients like dried flower petals or oils (Earl Grey, a black tea with oil of bergamot, is probably the best known). Notice that we didn't say herbal. That's because an herbal tea, by definition, does not contain any true "tea" leaves. All three teas boast rich amounts of naturally occurring compounds called flavonoids. Scientists believe it may be these compounds that could account for the lower risk of cancer and heart disease among tea drinkers. In part, flavonoids work as antioxidants-substances that protect cells from troublemaking particles called free radicals. They also may discourage blood from forming dangerous dots that bring on heart attacks and strokes.
Prevention, May 1996
Rooibos Tea: Caffeine Free and Healthy
From the Himalayas to the Cliffs of Dover, people drink tea with faithful ritual. In Tibet they take it with butter, in England with cream. And now there's good reason for Americans to take it seriously. The tea plant, Camellia sinensis, comes in many forms--black, green, oolong. What makes Camellia so healthful is its polyphenols, antioxidants that protect against cell damage and help prevent diseases like age-related decline, cancer and heart disease. But herbal teas like chamomile don't have the same benefits. That is, all except one. The South African "rooibos," meaning red bush in Afrikaans, has the benefits of Camellia without the caffeine. Daneel Ferreira, M.D., of the University of Mississippi, studied and compared rooibos with Camellia and found that both contain a similar amount of polyphenols. And a study at Cambridge University in the United Kingdom bears out the benefits. Researchers found that tea drinking is associated with higher bone-mineral density. Among the 1,256 women studied, tea drinkers were up to 20% less likely to suffer bone fractures. And at Case Western Reserve School of Medicine, tea polyphenols helped prevent the development of arthritis in lab mice. With rooibos's many benefits, Americans should consider incorporating England's afternoon tea ritual--for both its soothing and healing potential.
Psychology Today, Mar/Apr 2001
More antioxidants with loose tea
In Japan, folks often drink 4 to 10 cups of green tea daily, says tea researcher Lester A. Mitscher, PhD. Here's how to get the biggest antioxidant boost, Fresh brewed is best. Antioxidant catechins-the potential sniffle stoppers in green tea-break down fast. Keep it loose. Tea made from loose leaves has more antioxidants than tea bags, which tend to have lower-quality, powdered leaves. Watch your water. Chlorine in tap water can lower antioxidant levels if it is not brought to a full boil first. For the best -- tasting tea, use distilled water; the minerals in water change tea's flavor. Time it. Steep for just 2 to 3 minutes to avoid a bitter taste.
Prevention, April 2003
Tea is Good for You
Hardly a week goes by without news of yet another research study confirming the health benefits of tea. However, not all teas are equally good for you. The chart nearby compares the ECGCs (tea's healthy flavonoids) found in our full-leaf teas versus those found in the supermarket tea bags. Unsurprisingly, the full-leaf teas yield 1/3 to 1/2 more ECGCs, delivering more benefits in each cup.
White tea appears to have more potent anticancer qualities than green tea.
White tea appears to have more potent anticancer qualities than green tea, according to studies performed at the Linus Pauling Institute of Oregon State University in Corvallis. The researchers tested the tea to determine whether it could help prevent genetic mutations in bacteria, and colon and rectal cancer in cancer-prone rats. In both experiments, white tea was shown to have a strong protective effect. White tea offered significantly more protection than green tea. "I was surprised by the potency. We were not expecting that much of a good result," Dr. Santana-Rios told Reuters Health.
Reuters Health, March 30, 2000
White tea helps fight viruses and bacteria
If you're trying to fight off infections and illness, sip white tea instead of green, suggests Milton Schiffenbauer, Ph.D., a microbiologist and professor at Pace University in New York City. In laboratory tests, Schiffenbauer found white tea, which has a delicate flavor, more effective than green tea at inactivating viruses, bacteria and fungi responsible for streptococcus infections and pneumonia. When it comes to fighting bugs, "white tea is about 10 percent more effective than green," he says.
Shape Magazine, October 2004
White Tea has Anti-viral benefits
Studies conducted by Milton Schiffenbauer, PhD, at Pace University in New York City show that white tea extract contains antiviral, antibacterial and antifungal properties. Drinking white tea was as effective at suppressing intestinal tumors as ingesting sulindac (Clinoril), a nonsteroidal anti-inflammatory drug used for cancer treatment, in a study published in the February 2003 issue of Carcinogenesis.
Better Nutrition, 9/2006 Vol 68, Issue 9