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  • Basic Info
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Generic: Soy germ
treats Diarrhea in adults, Cognitive function, Endocrine disorders, Cardiac ischemia, Type 2 diabetes, Prostate cancer prevention, Kidney disease, Obesity/weight reduction, Skin aging, Dietary source of protein, Breast cancer prevention, Colon cancer prevention, Tuberculosis, Cyclical breast pain, Thyroid disorders, Crohn's disease, Diarrhea, Menstrual migraine, Gallstones, High blood pressure, Stomach cancer, Osteoporosis, post-menopausal bone loss, Cardiovascular disease, Endometrial cancer prevention, High cholesterol, Menopausal symptoms, Exercise capacity improvement, Skin damage caused by the sun, and Cancer treatment

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Interactions with Drugs

Soy contains "phytoestrogens" (plant- based compounds with weak estrogen- like properties), such as isoflavones. It is not clear if isoflavones stimulate or block the effects of estrogen or both (acting as a "receptor agonist/antagonist"). It is not known if taking soy or soy isoflavone supplements increases or decreases the effects of estrogen on the body, such as the risk of blood clots. It is unclear if taking soy alters the effectiveness of birth control pills containing estrogen.

It is not known what the effects of soy phytoestrogens are on the anti- tumor effects of selective estrogen receptor modulators (SERMs) such as tamoxifen. The effects of aromatase inhibitors such as anastrozole (Arimidex®), exemestane (Aromasin®), or letrozole (Femara®) may be reduced. Because of the potential estrogen- like properties of soy, people receiving these drugs should speak with their oncologists before taking soy in amounts greater than normally found in the diet.

Soy protein may interact with warfarin (Coumadin®), although this potential interaction is not well characterized. Patients taking warfarin should check with a doctor and pharmacist before taking soy supplementation.

Interactions with Herbs and Dietary Supplements

The effects of soy protein or flour on iron absorption are not clear. Studies in the 1980s reported decreases in iron absorption, although more recent research has noted no effects or increased iron absorption in people taking soy. People using iron supplements as well as soy products should consult their qualified healthcare practitioners to follow blood iron levels. Calcium and phosphate levels may be altered.

Some experts believe that there may be a potential interaction between soy extract and Panax ginseng, although this possible interaction is not well understood.

Prebiotics (complex sugars) do not appear to affect how the body absorbs soy. It is unclear if probiotics (commonly found in cultured milk products like yogurt) affect the absorption of soy.

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