Home | About Natural News | Contact Us | Write for Natural News | Media Information | Advertise with Natural News
NaturalNews.com

Soy phytoestrogens may block estrogen effects (press release)

Monday, August 28, 2006 by: NaturalNews, citizen journalist
Key concepts: Estrogen, Soy and Isoflavones
Share/Save/Bookmark   Email this article to a friend Printable Version  FREE Email Newsletter

Articles Related to This Article:

Good news for menopausal women: You can avoid hot flashes by changing your diet

Good news for menopausal women: You can avoid hot flashes by changing your diet

Lignans Shown to Provide Great Benefits for Breast Health



Sign the Health Revolution Petition

Join the call for genuine health freedom in America. End FDA tyranny and Big Pharma corruption. Watch the video and sign the petition here.
Research in monkeys suggests that the natural plant estrogens found in soy do not increase markers of breast cancer risk in postmenopausal women. In fact, they may provide a protective effect in some women. The research is reported today in Cancer Research.

"Even at high doses, we found no evidence that the estrogen-like compounds in soy, called isoflavones, stimulate cell growth or other markers for cancer risk in breast tissue," said Charles E. Wood, D.V.M., Ph.D., lead researcher, from Wake Forest University Baptist Medical Center. "The study also suggests that women who have higher levels of estrogen may actually gain a protective effect from higher doses of soy isoflavones."

Wood said there has been much debate about whether higher levels of dietary soy are safe or beneficial for postmenopausal women. Some evidence has suggested that isoflavones may protect against the more powerful estrogen produced by the body, which is an important risk factor for breast cancer in postmenopausal women. For example, population studies show that women who consume diets high in soy generally have lower rates of breast cancer.

On the other hand, soy isoflavones have been shown to stimulate breast cancer cells in mice and in cells grown in the laboratory.

"Our study sought to make sense of these seemingly contradictory data," said Wood. "Our hypothesis was that estrogen levels in the body may influence the effects of soy isoflavones."

Wood and colleagues evaluated the effects of dietary isoflavones in the presence of different levels of estrogen by rotating 31 postmenopausal cynomolgus monkeys through eight different diets. Each diet contained one of four different isoflavone doses along with either a low or a high dose of estrogen.

Isoflavone doses were equivalent to the following human levels: no isoflavones, 60 milligrams (comparable to the typical Asian diet), 120 milligrams (the highest levels that can be consumed through diet alone), or 240 milligrams (levels obtained through supplements). Estrogen doses were designed to mimic either a low or high-estrogen environment found in postmenopausal women. Estrogen levels in postmenopausal women can vary depending on their amounts of body fat, which produces estrogen, and whether they are taking hormone therapy.

The researchers measured how the diets affected markers for breast cancer risk, including breast cell proliferation. In the low-estrogen environment, no evidence of increased proliferation was seen at any level of isoflavone exposure, even at doses almost several times higher than in a typical Asian diet.

In the high-estrogen environment, there was higher breast cell proliferation both when isoflavones weren't in the diet and when they were present in lower doses. However, the addition of high levels of dietary soy isoflavones tended to block estrogen effects in breast tissue. This finding suggests that postmenopausal women with higher levels of estrogen may derive the greatest benefit from soy.

"For women at increased risk of breast cancer due to higher estrogen levels, a diet rich in soy isoflavones may offer a modest breast-protective effect," said Wood. However, he said the study may not apply to premenopausal women, who have higher and more dynamic hormone levels, or to women taking combined hormone therapy with an estrogen and a progestin.

The senior investigator of the study was J. Mark Cline, D.V.M., Ph.D. Other researchers involved in the study were Thomas C. Register, Ph.D., and Mary S. Anthony, Ph.D., both from Wake Forest Baptist, and Adrian A. Franke, Ph.D., from the Cancer Center of Hawaii.


Get articles like this delivered to you FREE in our popular email newsletter

Related CounterThink Cartoons:


Related Articles:

Good news for menopausal women: You can avoid hot flashes by changing your diet

Good news for menopausal women: You can avoid hot flashes by changing your diet

Lignans Shown to Provide Great Benefits for Breast Health

Take Action: Support NaturalNews.com

Email this article to a friend

Share this article on: NewsVine | digg | del.icio.us

Permalink to this article:

Reprinting this article: Non-commercial use OK, cite NaturalNews.com with clickable link.

Embed article link: (copy HTML code below):

FREE Report: The Five Best Anti-Viral Products to Beat Influenza, Swine Flu, Bird Flu and SARS

• Top anti-viral remedies
• Where to get them now
• Four things to avoid
• Become self-reliant
• Boost your family safety

Click here to read the FREE report now.

W.H.O. Declares Global Pandemic
Turn FEAR into Confidence!

Listen to the complete 3.5 hour recording on 4 audio CDs of the Health Ranger's Swine Flu Advanced Preparedness Course, covering natural anti-virals, family safety, infrastructure disruptions, quarantine, preparedness gear and much more.

Testimonials:

"Mike Adams' preparedness course turned our fears into confidence. This is POWERFUL information, coming from a trusted source. If you want to save yourself countless hours researching and getting prepared and if you want to do everything in your power to protect your family, I highly recommend the Health Ranger’s Advanced Preparedness Course."
- N. Nelson (Arizona)

"This is packed information no one should miss."
- T. Valenzuela

"Thanks Mike... during this class you covered prevention and preparedness from A to Z with integrity, brave honesty and outstanding knowledge! Thank you for your steadfast, thorough and cool-headed approach to well being. With deep gratitude for your service." - Bev

Available NOW for immediate shipping.
100% satisfaction guarantee

Click here to learn more...


NEW Product: Valley of Longevity Shampoo from the Health Ranger

• 98% Organic
• 100% Natural
• 100% Fragrance Free!
• No SLS
• No Parabens
• No synthetic chemicals
• FREE shipping in U.S. on orders over $75

Click here to read more...


FREE report by the Health Ranger, plus a FREE subscription to his Vilcabamba, Ecuador real estate announcement list:


Enter your email address to download it now:

(Email privacy guaranteed.)


8 Weeks to Vibrant Health
A Breakthrough Guide to Women's Health by
Dr. Hyla Cass M.D.

Learn why this is the must-read guide to women's health you've been waiting for... Click here...


Breaking News Stories:

     See more breaking news...

What is this?


Enter your email address to learn more:

(Email privacy guaranteed.)

Free Special Reports

How to Build Your Financial Safety Net
The 7 Principles of Mindful Wealth
The Healing Power of Sunlight and Vitamin D
The pH Nutrition Guide to Acid / Alkaline Balance
Pet Food Ingredients Revealed! (shocking)
Medicine From Fish
The Water Cure

Recommended Products Related to This Article*:

Revealed: Natural Health Solutions (free)
Free summary of book by Mike Adams
for learning censored natural health remedies

Additional Products of Interest to All

Katadyn Exstream XR Water Purifier
#1 personal water purifier
for clean, pristine water in seconds

Preparedness Tools Natural News Bundle
For preparedness and safety: 60% off
for preparing for natural disasters

How to Halt Diabetes in 25 Days
Health Ranger guide to reversing diabetes
for reversing type-2 diabetes

Free download: Selling Sickness (summary)
Read the best book on disease mongering
for learning the truth about Big Pharma

Exposed! The Toxic Chemistry of Products
Free summary of this shocking book
for learning the truth about toxic products

Appetite for Profit (free download)
Free download summary of this top book
for discovering the truth about food companies

The Biology of Belief by Bruce Lipton
A free download of Biology of Belief
for learning about the mind-biology connection

The Genie In Your Genes by Dawson Church
A free, downloadable summary of this book
for learning about the biology of intention

Katadyn MicroPur Water Purifier Tablets
The best water purification tablets
for purifying almost any water source

The Weiss Method for Heart Disease
How to reverse heart disease naturally
for heart disease, high cholesterol

* Products do NOT pay to be listed here. These are genuine, independent recommendations by the Health Ranger

☯ Products with this symbol are sold by NaturalNews or its affiliates and earn revenues for NaturalNews

Also on NaturalNews:

Streaming Health Ranger Videos
CounterThink Cartoons
FREE Special Reports
Podcasts


Home | About Natural News | Contact Us | Write for Natural News | Media Information | Advertise with Natural News

This site is part of the Natural News Network © 2009 All Rights Reserved. Privacy | Terms All content posted on this site is commentary or opinion and is protected under Free Speech. Truth Publishing International, LTD. is not responsible for content written by contributing authors. The information on this site is provided for educational and entertainment purposes only. It is not intended as a substitute for professional advice of any kind. Truth Publishing assumes no responsibility for the use or misuse of this material. Your use of this website indicates your agreement to these terms and those published here. All trademarks, registered trademarks and servicemarks mentioned on this site are the property of their respective owners.