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Tea

NEWS:

Black Tea May Fight Diabetes

Chinese Herbal Tea Ingredient Linked to Cancer “Herbal teas may help you relax, but new studies show that an acid found in Chinese herbal teas may increase the risk of urinary tract cancer. The carcinogen aristolochic acid, which was found in many prescribed Chinese herbal products including Guan Mu Tong, was linked to a higher risk of cancer. “

Drink Green Tea For Healthy Teeth And Gums

Green Tea Drinking Linked to Lower Risk for Distal Gastric Cancer in Women

Green Tea May Prevent Kidney Stones

Green tea (Camellia sinensis) for the prevention of cancer. (Cochrane Database Syst Rev. 2009) “AUTHORS' CONCLUSIONS: There is insufficient and conflicting evidence to give any firm recommendations regarding green tea consumption for cancer prevention. The results of this review, including its trends of associations, need to be interpreted with caution and their generalisability is questionable, as the majority of included studies were carried out in Asia (n = 47) where the tea drinking culture is pronounced. Desirable green tea intake is 3 to 5 cups per day (up to 1200 ml/day), providing a minimum of 250 mg/day catechins. If not exceeding the daily recommended allowance, those who enjoy a cup of green tea should continue its consumption. Drinking green tea appears to be safe at moderate, regular and habitual use.”

Health Benefits Of Green Tea May Decrease After Long Storage

Model Backs Green Tea And Lemon Claim, Lessens Need To Test Animals “The in vivo study backed up the model study that showed adding sugar and vitamin C to green tea enhanced the body's ability to absorb polyphenols. Ferruzzi said that adding lemon juice or other citrus juice to tea would do the trick, or consumers could look for ready-to-drink products that contain 100 percent of the recommended amount of vitamin C or ascorbic acid on the ingredient list. "Having that vitamin C seems to do it," Ferruzzi said. "And if you don't want to squeeze a lemon into your cup, just have a glass of juice with your green tea."”

Stability of Green Tea Catechins in Commercial Tea Leaves during Storage for 6 Months (Journal of Food Science 2009) “To our knowledge, this is the 1st report on changes in biologically active green tea catechins during long-term storage of commercial tea leaves in the dry state. The results of the present study for 8 commercial teas of unknown history as well as the results from related studies by other investigators mentioned previously suggest that the consumer needs to be aware about possible adverse consequences of long-termstorage of commercial tea brands. Our results show that even in the absence of moisture, quality of teas may degrade with time. Labeling for catechin content and knowledge of storage history may facilitate consumption of the most healthful teas. It is also worth noting that among tea catechins, EGCG, which appears to be susceptible to degradation during storage of the tea leaves, is reported to have the highest activity against bacteria, bacterial toxins, viruses, human cancer cells, and in lipid bilayers of cell membranes (Friedman 2007; Friedman and others 2007; Juneja and others 2007; Sirk and others 2008). … Finally, the results of the present study suggest that consumersmay benefit from knowing the storage history of teas sold at retail.”

Steaming hot tea linked to cancer “Drinking steaming hot tea has been linked with an increased risk of oesophageal (food tube) cancer, Iranian scientists have found. The British Medical Journal study found that drinking black tea at temperatures of 70C or higher increased the risk. Experts said the finding could explain the increased oesophageal cancer risk in some non-Western populations. … Oliver Childs, a spokesman for Cancer Research UK, said: "Tea drinking is part of many cultures, and these results certainly don't point to tea itself being the problem. "But they do provide more evidence that a regular habit of eating and drinking very hot foods and drinks could increase your risk of developing cancer of the oesophagus." He added: "People in this region of northern Iran often drink very hot tea as part of their daily routine. We're a nation of tea lovers in the UK, but we don't tend to drink tea at such high temperatures and we usually add milk, which cools it down." “

ARTICLES:

Heal Yourself With Iced Tea

JOURNAL ARTICLES:

Bioavailability of catechins from ready-to-drink tea. (Nutrition. 2009)

Depigmenting Effect of Catechins. (Molecules. 2009)

Effects of Tea Catechins, Epigallocatechin, Gallocatechin, and Gallocatechin Gallate, on Bone Metabolism. (J Agric Food Chem. 2009)

Epigallocatechin-3-gallate Increases Maximal Oxygen Uptake in Adult Humans. (Med Sci Sports Exerc. 2009)

Green and Black Tea Consumption and Risk of Stroke. A Meta-Analysis. (Stroke. 2009) “CONCLUSIONS: Although a randomized clinical trial would be necessary to confirm the effect, this meta-analysis suggests that daily consumption of either green or black tea equaling 3 cups per day could prevent the onset of ischemic stroke.”

Green tea and bone metabolism (Nutrition Research 2009) “In general, tea and its bioactive components might decrease the risk of fracture by improving bone mineral density and supporting osteoblastic activities while suppressing osteoclastic activities.”

Green tea and death from pneumonia in Japan: the Ohsaki cohort study. (Am J Clin Nutr. 2009) “CONCLUSION: Green tea consumption was associated with a lower risk of death from pneumonia in Japanese women.”

Green Tea Consumption and Hematologic Malignancies in Japan (American Journal of Epidemiology 2009) “In conclusion, green tea consumption was associated with a lower risk of hematologic malignancies.”

Green Tea Consumption and Mortality among Japanese Elderly People: The Prospective Shizuoka Elderly Cohort. (Ann Epidemiol. 2009) “CONCLUSIONS: Green tea consumption is associated with reduced mortality from all causes and CVD. This study also suggests that green tea could have protective effects against colorectal cancer.”

Green tea consumption and the risk of liver cancer in Japan: the Ohsaki Cohort study. (Cancer Causes Control. 2009) “CONCLUSIONS: Green tea consumption is associated with a reduced risk of liver cancer incidence.”

Green tea consumption is associated with lower psychological distress in a general population: the Ohsaki Cohort 2006 Study. (Am J Clin Nutr. 2009)

Green tea: nature's defense against malignancies. (Crit Rev Food Sci Nutr. 2009)

Green tea, black tea consumption and risk of lung cancer: A meta-analysis. ( Lung Cancer. 2009) “In conclusion, our data suggest that high or an increase in consumption of green tea but not black tea may be related to the reduction of lung cancer risk.”

Green Tea (-)-Epigallocatechin-3-Gallate Inhibits {beta}-Amyloid-Induced Cognitive Dysfunction through Modification of Secretase Activity via Inhibition of ERK and NF-{kappa}B Pathways in Mice. (J Nutr. 2009) “Alzheimer's disease (AD) is characterized by the extracellular deposition of beta-amyloid peptide (Abeta) in cerebral plaques. Abeta is derived from the beta-amyloid precursor protein (APP) by the enzymes alpha-, beta- and gamma-secretase. Compounds that enhance alpha-secretase, but inhibit beta- or gamma-secretase activity, have therapeutic potential in the treatment of AD. Green tea, or its major polyphenolic compound, has been shown to have neuroprotective effects.”

Protective Effects of Tea Polysaccharides and Polyphenols on Skin. (J Agric Food Chem. 2009)

Tea consumption and risk of breast cancer. (Cancer Epidemiol Biomarkers Prev. 2009) “CONCLUSION: We observed evidence to support a potential beneficial influence for breast cancer associated with moderate levels of tea consumption (three or more cups per day) among younger women. Further research is needed to confirm this association.”

Tea polyphenols regulate key mediators on inflammatory cardiovascular diseases. (Mediators Inflamm. 2009) “Tea polyphenols known as catechins are key components with many biological functions, including anti-inflammatory, antioxidative, and anticarcinogenic effects. These effects are induced by the suppression of several inflammatory factors including nuclear factor-kappa B (NF-?B). While these characteristics of catechins have been well documented, actions of catechins as mediators on inflammation-related cardiovascular diseases have not yet been well investigated. … From our results, catechins are potent agents for the treatment and prevention of inflammation-related cardiovascular diseases because they are critically involved in the suppression of proinflammatory signaling pathways.”

Topical application of green and white tea extracts provides protection from solar-simulated ultraviolet light in human skin. (Exp Dermatol. 2009) “RESULTS: Topical application of green and white tea offered protection against detrimental effects of UV on cutaneous immunity. Such protection is not because of direct UV absorption or sunscreen effects as both products showed a sun protection factor of 1. There was no significant difference in the levels of protection afforded by the two agents. Hence, both green tea and white tea are potential photoprotective agents that may be used in conjunction with established methods of sun protection.”

White Tea Could Keep You Healthy And Looking Young “Eight of the other plants and herbs analysed also helped protect against the breakdown of both elastin and collagen. After white tea, bladderwrack performed well followed by extracts of cleavers, rose, green tea, angelica, anise and pomegranate.”

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