Navigation Links
Caffeine May Alter Women's Estrogen Levels
Date:1/26/2012

THURSDAY, Jan. 26 (HealthDay News) -- Caffeine changes women's estrogen levels and has different effects in Asian and white women, a new study says.

More than 250 women, ages 18 to 44, took part in the study between 2005 and 2007. On average, they consumed 90 milligrams of caffeine a day, about the equivalent of one cup of caffeinated coffee.

Estrogen is the reproductive hormone produced by the ovaries.

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.

Consuming 200 milligrams of caffeine from coffee mirrored the overall findings. But consumption of more than one cup each day of caffeinated soda or green tea was associated with higher estrogen in all three groups of women, according to the study published online in the February issue of the American Journal of Clinical Nutrition.

The 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.

About 89 percent of U.S. women ages 18 to 34 consume the caffeine equivalent of 1.5 to two cups of coffee a day, according to the authors.

"The results indicate that caffeine consumption among women of child-bearing age influences estrogen levels," Enrique Schisterman, of the Division of Epidemiology, Statistics and Prevention Research at the U.S. National Institute of Child Health and Human Development, said in an NIH news release.

"Short term, these variations in estrogen levels among different groups do not appear to have any pronounced effects. We know that variations in estrogen level are associated with such disorders as endometriosis, osteoporosis, and endometrial, breast and ovarian cancers. Because long-term caffeine consumption has the potential to influence estrogen levels over a long period of time, it makes sense to take caffeine consumption into account when designing studies to understand these disorders," Schisterman said.

More information

Health Canada has more about caffeine.

-- Robert Preidt

SOURCE: U.S. National Institutes of Health, news release, Jan. 26, 2012


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. NIH study shows caffeine consumption linked to estrogen changes
2. Does caffeine enhance exercise performance? The debate continues
3. Jonesing for java: Could caffeine use predict risk for cocaine abuse?
4. Nevada School of Medicine researcher finds caffeine consumption, female infertility link
5. Caffeine May Interfere With Fertility in Women
6. Why caffeine can reduce fertility in women
7. Caffeine and diabetes -- helpful or harmful?
8. Most Young Children Consume Caffeine Each Day
9. Less is more, when it comes to sugary, high-caffeine energy drinks, researchers say
10. DecafaLife, LLC Announces New All-Natural Product to Keep You Energized While Kicking Your Caffeine Habit
11. New evidence caffeine may slow Alzheimers disease and other dementias, restore cognitive function
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Caffeine May Alter Women's Estrogen Levels
(Date:2/5/2016)... ... February 05, 2016 , ... Give To Cure today announced that ... donate to Give To Cure’s campaign that is crowdfunding clinical trials to help find ... share payments through a smart device. In 2015 alone, Venmo processed $7.5 billion in ...
(Date:2/5/2016)... (PRWEB) , ... February 05, 2016 , ... At its ... of Patrick McDermott as Chairman of the National Board of Directors. Mr. McDermott succeeds ... of the Board,” stated Leslie A. Chambers , APDA President and CEO. “Pat ...
(Date:2/5/2016)... Francisco, CA (PRWEB) , ... February 05, 2016 ... ... and founder of CitiDent, announces that it is now welcoming orthodontist, ... Dr. Cheng, CitiDent offers a complete range of oral health care, including general ...
(Date:2/5/2016)... ... ... Health and wellness is a topic that should concern all Americans; however, it ... illness. Migraines are a severe form of a headache and often are accompanied by ... pain on their worst enemy, the feeling can last for many hours and be ...
(Date:2/5/2016)... ... February 05, 2016 , ... Calls Blacklist has just been ... user interface design and the developer has fixed known bugs within the app. Calls ... on their phone while not consuming any of their device’s battery power or memory. ...
Breaking Medicine News(10 mins):
(Date:2/4/2016)... LODI, N.J. , Feb. 4, 2016  Montoya ... Pinnacle Professional in the field of Pharmaceuticals. Montoya is ... . ... and supplies, Becton Dickinson provides healthcare institutions, ... medical equipment throughout fifty countries across the globe. ...
(Date:2/4/2016)... Feb. 4, 2016 Global Immunology Market ... to drive long-term market growth Summary ... of chronic disorders that affect 5–7% of western ... of their symptoms and key patient demographics, they ... immune pathways and an inappropriate immune response. Generally, ...
(Date:2/4/2016)... Calif., Feb. 4, 2016  Omnicell, Inc. (NASDAQ: OMCL ... solutions to healthcare systems, today announced results for its ... --> --> GAAP results: ... million, up $5.1 million or 4.1% from the third ... from the fourth quarter of 2014. Revenue for the ...
Breaking Medicine Technology: