Health Benefits of Green Tea By Julie Edgar
Experts explain green tea's potential benefits for everything from fighting cancer to helping your heart.
More than a decade's worth of research about green tea's health benefits -- particularly its potential to fight cancer and heart disease -- has been more than intriguing, as have limited studies about green tea's role in lowering cholesterol, burning fat, preventing diabetes and stroke, and staving off dementia. The few large-scale human studies that have focused on green tea's impact on heart disease and cancer are promising, but many of those were conducted in the East, where green tea is a dietary mainstay. The outcomes are likely influenced by other lifestyle factors such as high consumption of fish and soy protein, says cardiologist Nieca Goldberg, MD, a spokeswoman for the American Heart Association and medical director of the New York University Women's Heart Center.
Green Tea's Powerful Antioxidants
Green tea's antioxidants, called catechins, scavenge for free radicals that can damage DNA and contribute to cancer, blood clots, and atherosclerosis. Grapes and berries, red wine, and dark chocolate also have potent antioxidants.
Because of green tea's minimal processing -- its leaves are withered and steamed, not fermented like black and oolong teas -- green tea's unique catechins, especially epigallocatechin-3-gallate (EGCG), are more concentrated.
But there's still a question of how much green tea you need to drink to reap its health benefits. EGCG is not readily "available" to the body; in other words, EGCG is not always fully used by the body.
"We must overcome the issue of poor bioavailability [and other issues] in order to get the most out of their benefits," says Tak-Hang Chan, PhD, professor emeritus in the department of chemistry at McGill University in Montreal. Chan has studied the use of a synthetic form of EGCG in shrinking prostate cancer tumors in mice, with success.
Posted by M/s Rhythm fitnes & Aerobic Centre
