Daily Deals Link

Soy Foods Safe for Breast Cancer Survivors

Soy Foods Safe for Breast Cancer Survivors: Main Image
Not only is soy safe for women who have survived breast cancer, but it may also help prevent recurrence
Concerns over the safety of eating soy foods when diagnosed with breast cancer led a team of researchers to investigate the matter further in the Shanghai Breast Cancer Survival Study. The results, published in the Journal of the American Medical Association, suggest that not only is soy safe for women who have survived breast cancer, but it may also be beneficial in preventing cancer recurrence.

Estrogen, soy, and breast cancer

Estrogen often plays a role in breast cancer development. Because of this, many of the therapies used to treat it work by blocking the action of estrogen in the body.

Soy foods can have both estrogen-like and anti-estrogen effects in the body, mainly due to compounds known as isoflavones. They also contain other substances that may prevent cancer, but not much is known about the use of soy foods by women who have had breast cancer. Some studies suggest that the estrogenic effects of soy isoflavones may promote cancer recurrence, while others have shown that soy may protect against it.

Soy has been eaten for thousands of years in Asia, but its popularity in Western nations has only caught on much more recently. Soy isoflavones are now frequently added to many processed foods and “exposure to isoflavones is becoming ubiquitous, which is heightening concern about soy food consumption among the rapidly increasing population of breast cancer survivors,” said the researchers.

The new study looked at more than 5,000 breast cancer survivors aged 20 to 75 years. During the average follow-up period of four years, 444 women died and 534 had a recurrence or died of breast cancer-related causes.

Soy seems safe

Eating soy foods was inversely related to mortality and to breast cancer recurrence. That is, compared with women who ate the least soy, those who ate the most (more than 15 grams of soy protein per day, or more than 63 mg of isoflavones per day) had a 29% reduced risk of death and 32% decreased risk of breast cancer recurrence.

The positive effect seemed to level off after about 11 grams of soy protein or 40 mg of soy isoflavone intake per day, suggesting, as the authors state, that “moderate soy food intake is safe and potentially beneficial for women with breast cancer.” Soy foods seemed to benefit women with both estrogen receptor (ER)-positive and ER-negative cancers.

The researchers also looked at how much soy women consumed who were also taking the anti-cancer drug, tamoxifen. Because soy and tamoxifen both bind to estrogen receptors, there has been some concern about using them together. They found that soy foods improved survival regardless of tamoxifen use, and that soy foods and tamoxifen may have comparable effects on breast cancer outcomes.

Since many soy preparations are newer to the human diet—such as concentrated soy isoflavone extracts and isolated soy protein—it might be prudent to focus on real food sources of soy, like tempeh, tofu, edamame, and miso. These foods have been eaten for centuries in parts of the world where breast cancer rates are lowest.

(JAMA 2009;302:2437–43)

Kimberly Beauchamp, ND, earned her bachelor’s degree from the University of Rhode Island and her Doctorate of Naturopathic Medicine from Bastyr University in Kenmore, WA. She cofounded South County Naturopaths in Wakefield, RI, and now sees patients in East Greenwich and Wakefield. Inspired by her passion for healthful eating and her own young daughters, Dr. Beauchamp is currently writing a book about optimizing children’s health through better nutrition.

Copyright © 2020 TraceGains, Inc. All rights reserved.

Learn more about TraceGains, the company.

Blog
Facebook
YouTube
Twitter
Pintrest
Shop Ortho Molecular
Metagenics
Pure Encapsulations
Diamond Formulations
Douglas Laboratories
Designs For Health
Thorne Research
Integrative Therapeutics
Neuro Science
Vital Nutrients
Bezwecken
Progressive Labs
Allergy Research Group
Designs For Health
Nutra BioGenesis
DaVinci Laboratories
Genestra Brands
See All Brands
Click for the BBB Business Review of this Vitamins & Food Supplements in Sarasota FL
Alert Site

Please Note: Professional Supplement Center assumes no risk or liability for your use or misuse of information contained on this website. Health related and label information change frequently, and while every attempt has been made to ensure that the content on this site is accurate, product infomation changes are subject to change without notice. Additionally, to comply with our return policy, the label should be reviewed prior to opening a product. You should always check with a healthcare practitioner before taking any supplements.

These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, or prevent any disease.
This site is not owned or operated by either Metagenics, Inc. or NeuroScience Inc.
Douglas Laboratories' logo, text, graphics, and photo images are the property of HVL LLC dba Douglas Laboratories and are used with permissions. Copyright © 2020.
Pure Encapsulations' logo, text, graphics, and photo images are the property of Pure Encapsulations, Inc. and are used with permissions. Copyright © 2020.

© Copyright 2020 Professional Supplement Center, LLC, 5441 Palmer Crossing Circle, Sarasota, FL 34233. All rights reserved. Local time is 8/13/2020 12:54:31 PM.