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WHY IS SOY PROTEIN BAD?
Jul 17, 2012 | By
Soy is a high-value crop in tropical and temperate regions. It is unique in its accumulation of both high levels of protein and vegetable oil. Soy protein contains naturally occurring chemicals called isoflavones, which are thought to be responsible for many health benefits of soy. The down-side of soy isoflavones cannot be overlooked, however. You should consult your doctor about whether to use soy formulas.
BREAST CANCER
Soy protein and its isoflavones may raise your breast cancer risk by mimicking estrogen, a female hormone. Genistein and daidzen, two principle isoflavones in soy protein, have been shown to increase the effects of estrogen in women whose estrogen levels have declined. Estrogen is essential to normal human health but elevated estrogen levels are linked to hormone-dependent breast cancers. Soy isoflavones act as the steroidal estrogen in the body and hold the risks of natural estrogens, according to the Sprecher Institute at Cornell University.
SOY ALLERGY
Some people report experiencing allergic reactions after eating soy protein foods. Soy food allergies can cause symptoms ranging from harmless skin reactions to gastrointestinal disturbances -- such as stomach cramps, indigestion, bloating, diarrhea, gas and nausea; shortness of breath; wheezing; difficulty in breathing and a sharp drop in blood pressure. In severe cases, patients may lose their consciousness.
THYROID DISEASE
People with existing thyroid conditions must be careful about how much soy protein they eat on a daily basis. Soy protein or its isoflavones can interfere with the production of thyroid hormones, specifically when eaten uncooked. This can lead to hypothyroidism symptoms, such as fatigue, depression, constipation, weight gain, skin changes, forgetfulness and goiter. The anti-thyroid effects of soy are predominantly caused by the inhibition of the enzyme thyroid peroxidase in thyroid hormone production.
GOUT
Consuming soy protein products, such as tofu, miso, soy milk, soy butter and soy nuts, could precipitate gout in some individuals. Gout is a painful inflammatory arthritis caused by the accumulation of uric acid crystals in joint spaces. Uric acid forms from purine metabolism. Purine is a naturally occurring substance found in tissues and in particular foods. Soy protein foods are rich in purines, which encourage the production of uric acid in your body.
REFERENCES
- University of Maryland Medical Center; Soy; Dec. 14, 2009
- Cornell University: Sprecher Institute; Phytoestrogens and Breast Cancer;Barbour S. Warren, et al.; Jul. 1, 2002
- University of Mississippi; Food Intolerance and Allergies; 2003
- "Food Allergies: Let Us Know, WeCare"; Alfonso Tirado; 2005
- “The Anti-Estrogenic Diet: How Estrogenic Foods and Chemicals Are MakingYou Fat and Sick”; Ori Hofmekler and Rick Osborn; 2007
- Florida Agency for Health Care Administration; Soy; May 3, 2009
http://www.livestrong.com/article/415749-why-is-soy-protein-bad/#ixzz23oGUGYn0
posted by TDePauw @ 6:11 AM
1 Comments
1 Comments:
I stopped drinking Cow's milk because of hormones such as rBGH. Now I usually use soy milk. Should I switch to rice miilk only?
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