Caffeine may alter women's estrogen levels, study says
Caffeine may alter women's estrogen levels, study says
Caffeine changes women's estrogen levels and has different effects in Asian and white women, a new study says.
Caffeine-related changes in estrogen levels did not appear to affect women's ovulation, said the researchers, who followed the women for up to two menstrual cycles.
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Asian women who consumed an average of 200 milligrams or more of caffeine a day (equivalent to about two cups of coffee) had elevated estrogen levels compared to women who consumed less. But white women who consumed the same amount of caffeine had slightly lower estrogen levels than women who consumed less.
Black women who consumed 200 or more milligrams of caffeine daily had elevated estrogen levels, but this finding was not statistically significant, said the U.S. National Institutes of Health researchers and their colleagues.
The caffeine consumed by the women in the study came from any of these sources: coffee, black tea, green tea and caffeinated soda. The findings differed slightly when the researchers considered the source of caffeine individually.
http://yourlife.usatoday.com/health/story/2012-01-29/Caffeine-may-alter-womens-estrogen-levels-study-says/52823576/1
= new reply since forum marked as read
and the fact I suffered NO sideeffects. None. Zip. Zilch. I just went into menopause last year and I don't feel the difference other than my monthly is O-V-E-R. And I'm going to be 50 this May. 
I'm Asian and drink about six to eight cups of coffee (Italian Roast, Starbucks ground) every day!
Oh, and coffee is also the number one antioxidant, but I drink it because I love the stuff. 
Coffee came out on top, on the combined basis of both antioxidants per serving size and frequency of consumption, Vinson says. Java easily outranked such popular antioxidant sources as tea, milk, chocolate and cranberries, he says. Of all the foods and beverages studied, dates actually have the most antioxidants of all based solely on serving size, according to Vinson. But since dates are not consumed at anywhere near the level of coffee, the blue ribbon goes to our favorite morning pick-me-up as the number one source of antioxidants, he says.
Besides keeping you alert and awake, coffee has been linked to an increasing number of potential health benefits, including protection against liver and colon cancer, type 2 diabetes, and Parkinson's disease, according to some recently published studies. But there's also a downside: Java can make you jittery and cause stomach pains, while some studies have tied it to elevated blood pressure and heart rates. More research is needed, particularly human studies, to firmly establish its health benefits, Vinson says.
http://www.physorg.com/news6067.html
