Navigation Links
Soy Beneficial for Breast Cancer Survivors: Study

Surprising finding shows it reduces risk of death, recurrence

TUESDAY, Dec. 8 (HealthDay News) -- Regular, moderate consumption of soy foods can help lower the risk of death and cancer recurrence in women who've had breast cancer, new research shows.

What's more, the association between soy and a reduced risk of death held true even for women with estrogen receptor-positive cancers and women taking tamoxifen, according to the study published in the Dec. 9 issue of the Journal of the American Medical Association.

"We found that women with a history of breast cancer who consumed moderate amounts of soy food were doing better in terms of prognosis. They had reduced mortality and reduced recurrence," said study author Dr. Xiao Ou Shu, a professor of medicine and a cancer epidemiologist at Vanderbilt University Medical Center in Nashville, Tenn.

There has been some concern that soy might increase the risk of breast cancer or worsen the prognosis for women already diagnosed with the disease because soy is what's known as a phytoestrogen. That means that it can act like a weak form of estrogen in the body.

However, it appears those concerns may have been unfounded because Shu and her colleagues found that soy actually reduces the availability of naturally occurring estrogen by binding to its receptors.

"In our study, we found that soy food has a very similar effect to tamoxifen," said Shu. Tamoxifen is a drug that blocks the action of estrogen in the body, which can be helpful for treating cancers that are fueled by estrogen.

Shu's study included just over 5,000 Chinese women who had been previously diagnosed with breast cancer between 2002 and 2006. The women were aged 20 to 75, with the majority of women between 40 and 60 at the time of diagnosis.

The researchers collected information on cancer diagnosis and treatment, lifestyle factors (including diet) and disease progression at six months after diagnosis, and then again at 18, 36 and 60 months after diagnosis.

Women who had the highest intake of soy had a 29 percent reduced risk of death and a 32 percent decrease in the risk of cancer recurrence compared to those who ate less than 5.3 grams of soy per day.

"There was a linear response, and we found the higher the intake, the lower the mortality, up to 11 grams of soy protein," Shu said, adding that after 11 grams daily the benefit leveled off, but didn't decline.

Eleven grams of soy translates to about one-fourth of a cup of tofu each day, she said.

Both Shu, and Dr. Gina Villani, chief of hematology/oncology at The Brooklyn Hospital Center in New York City, said it's important to note that Chinese women tend to get their soy from natural sources, such as tofu, edamame or unsweetened soy milk, instead of the processed types of soy foods that many Americans eat, such as sweetened, flavored soy milk or soy-based protein bars.

"The take-home lesson is that whole foods are what we need to eat more of," said Villani. "Try to stay away from the processed stuff. Don't bulk up on soy milk or soy candy bars."

Shu also pointed out that Chinese women may be replacing unhealthier food choices, such as red meat, with soy. In an accompanying editorial in the same issue of the journal, experts from the U.S. National Cancer Institute noted that the average daily soy intake for people living in China makes up 10 percent or more of their daily protein intake.

Both Shu and Villani advise against loading up on soy supplements, as these haven't been proven to be beneficial, and Villani said it's unclear if such high levels of soy could cause harm.

And, Villani added, "supplements don't replace food. We haven't even begun to understand the interactions between nutrients in food and the body. Soy as a bean may react different than soy from a candy bar in the body."

"Soy food intake has been shown to reduce the risk of breast cancer, and it may have cardiovascular benefit, so overall, whether or not you have cancer, soy could be very beneficial to you and could become an important component of a healthy diet," Shu said. "But try to get it in natural sources, not from processed food."

More information

For more on soy, visit the U.S. National Library of Medicine.

SOURCES: Xiao Ou Shu, M.D., Ph.D., professor, medicine, and cancer epidemiologist, Vanderbilt University Medical Center, Nashville, Tenn.; Gina Villani, M.D., chief, division of hematology/oncology, Brooklyn Hospital Center, New York City; Dec. 9, 2009, Journal of the American Medical Association

Copyright©2009 ScoutNews,LLC.
All rights reserved

Related medicine news :

1. DNA vaccine against multiple sclerosis appears safe, potentially beneficial
2. Breaking Studies at AARC Congress Show Masimo SET and Masimo Rainbow SET to be Accurate, Effective and Uniquely Beneficial in Detecting and Tracking Disease States
3. PET/CT planning beneficial for head and neck cancer patients
4. Screening mammography in elderly patients beneficial
5. Radiation beneficial for older breast cancer patients
6. Mammography may be beneficial to all women, regardless of age
7. Enzyme Beneficial to Alzheimers Plays Darker Role in Other Dementia
8. Study in mice suggests molecules in plants have beneficial effect on Alzheimers disease
9. Cardiovascular Meds May Be Beneficial in Alzheimers Disease, According to MedPredict Report
10. Disclosing violence to primary care or obestetrics/gynecology physicians most beneficial
11. Disclosing violence to primary care or obstetrics/gynecology physicians most beneficial
Post Your Comments:
(Date:11/27/2015)... (PRWEB) , ... November 27, 2015 , ... ... of the well-respected Microsoft Dynamics SL User Group (MSDSLUG). Recognized as Microsoft’s official ... independent group of Microsoft Dynamics SL software users, partners, industry experts and representatives. ...
(Date:11/27/2015)... ... November 27, 2015 , ... The moment ... itself for not only fulfilling the needs of advisers and clients but going ... price and providing top-tier customer service. However, there's always room for improvement, which ...
(Date:11/27/2015)... ... 27, 2015 , ... CBD College is proud to announce that ... awarded accreditation to its Diagnostic Medical Sonography program. CBD College is honored to join ... twelve colleges and universities in the state of California make the cut. CBD College ...
(Date:11/27/2015)... (PRWEB) , ... November 27, 2015 , ... Dr. ... Medical Associates, Inc. and Dr. Tucker Bierbaum with Emergency Medicine at St., ... observed that both STEMI and Sepsis conditions present in similar ways and require time-critical ...
(Date:11/27/2015)... ... , ... Indosoft Inc., developer and distributor of the world-class ... (Long Term Support) into its Q-Suite 5.10 product line. , Making the change ... version of Asterisk that will receive not only security fixes, but feature and ...
Breaking Medicine News(10 mins):
(Date:11/26/2015)... Nederland, November 26, 2015 ... Een nieuwe aanpak combineert immunotherapie met Bremachlorin-photodynamische ... ) --> ...      (Photo: ) ... Universitair Medisch Centrum (LUMC) blijkt ...
(Date:11/26/2015)... -- 3D bioprinting market is expected to ... report by Grand View Research Inc. Rising prevalence of chronic ... transplantation is expected to boost the market growth, as 3D ... --> 3D bioprinting market is expected to ... report by Grand View Research Inc. Rising prevalence of chronic ...
(Date:11/26/2015)... DUBLIN , November 26, 2015 ... has announced the addition of the  ... in the Global Cell Surface Testing ... Opportunities" report to their offering.  ... the addition of the  "2016 Future ...
Breaking Medicine Technology: