Derived from soybeans, soy protein contains dietary fiber, iron, manganese and omega-3 fatty acids. The main compound found in soy protein is isoflavones, which are responsible for numerous health benefits. Soy protein can be found in soybeans, soy nuts, tofu, soy milk and soy protein powder. Research indicates that soy protein consumption might reduce the risk for breast cancer and prevent its reoccurrence.
Adolescence and Adulthood Soy Consumption
In research reported in the June 2009 issue of the "American Journal of Clinical Nutrition," researchers from Vanderbilt University School of Medicine explored the relationship between soy protein consumption during adolescence and adulthood on breast cancer risk. They discovered that high intakes of soy protein during adolescence and adulthood lowered the risk of breast cancer before menopause.
Breast Cancer Risk
Scientists from John Hopkins School of Medicine in Baltimore, Maryland performed a review of the clinical studies regarding the relationship between soy consumption and breast cancer risk. They concluded that soy intake was associated with a small reduction in breast cancer risk. Their findings were reported in the February 2006 issue of the "Journal of the National Cancer Institute."
Survival and Recurrence
In findings published in the December 2009 issue of the "Journal of the American Medical Association," researchers from Vanderbilt University Medical Center in Tennessee investigated the association between soy protein and breast cancer survival. They discovered that patients with the highest intakes of soy protein were less likely to die from breast cancer and lowered their risk of recurrence compared to those with the lowest intakes of soy protein.
Caution
Soy protein is generally considered safe, but individuals with an allergy or kidney disease should avoid its use. In addition, soy protein might lower iodine levels in the body and affect thyroid function, according to the University of Maryland Medical Center. Consult your health care provider before consuming soy rich products.
References
- Nutra Ingredients: Teen Soy Intake Linked to Lower Breast Cancer Risk
- Journal of the National Cancer Institute: Meta-Analysis of Soy Intake and Breast Cancer Risk; B.J. Trock et al.; February 2006
- Science Daily: Women With Breast Cancer Who Consume Soy Food Have Lower Risk of Cancer Recurrence
- University of Maryland Medical Center: Soy
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