Tea News October 2011October 7, 2011 Written by JP [Font too small?]
When I search for new topics in medical databases and journals, I frequently stumble upon a promising item or more about black, green or white tea. This is the latest batch of gems I’ve discovered about Camellia sinensis.
In July 2011, a study was published in the journal Experimental Dermatology that offers hope for the millions of men concerned about male pattern baldness. The experiment describes how the topical application of EGCG, a component of green tea, counteracts testosterone-induced death of hair follicles. Direct contact with green tea can also protect your teeth. Just last month, researchers from the University of Sao Paulo, Brazil discovered that the addition of green tea to conventional soda limits the extent of erosion caused to dentine. In Japan, an evaluation of 2,050 elementary school students determined that drinking 3 to 5 cups of green tea daily resulted in a 38% to 46% lower likelihood of influenza infection as compared to drinking <1 cup/day. In addition, the track record of green tea vs. cancer was recently bolstered by a Chinese study involving over 60,000 middle aged to senior men. In the examination, consuming green tea at least three times a week afforded significant protection against colorectal cancer (-46%). The authors of the trial explained that a 12% decline in risk was found for every cup of tea consumed by non-smokers.
Of late, there has also been some useful information presented about how to maximize the benefits of black and green tea. Australian scientists report that brewing green tea for approximately 30 minutes at a temperature of 175°F optimizes the extraction of delicate antioxidants. Meanwhile, black tea appears to release much of its health promoting properties when brewed for five or more minutes. Finally, if you happen to be a reluctant tea drinker because of its caffeine content, take notice of the following. According to a series of experiments conducted in Korea, phytochemicals contained in tea may blunt the cardiovascular activation that normally accompanies caffeine intake. The proposed mechanism has to do with EGCG’s ability to reduce adrenaline and noradrenaline production. This intriguing finding may allow for caffeine sensitive individuals to safely experiment with tea and perhaps derive the many benefits associated with its use.
To learn more about the studies referenced in today’s column, please click on the following links:
Study 1 – Effects of Topical Application of EGCG on Testosterone-Induced Hair … (link)
Study 2 – Effect of Supplementation of Soft Drinks with Green Tea Extract … (link)
Study 3 – Green Tea Consumption Is Inversely Associated with the Incidence of … (link)
Study 4 – Green Tea Consumption and Colorectal Cancer Risk: a Report … (link)
Study 5 – Optimizing Conditions for the Extraction of Catechins from Green Tea … (link)
Study 6 – Anti-Hyperglycemia Properties of Tea (Camellia sinensis) Bioactives … (link)
Study 7 – Increases in Blood Pressure and Heart Rate Induced by Caffeine are … (link)
Green Tea May Reduce Plaque Formation
Source: J Indian Soc Periodontol. 2011 Jan;15(1):39-45. (link)
Tags: Cancer, Flu, Green Tea
Posted in Children's Health, Food and Drink, Men's Health