Soy Supplements Can Decrease Sexual Behaviour

Commercial soy supplements, which are taken by increasing numbers of U.S. women, can decrease the normal sexual behaviour of female rats by up to 70 percent. The rats were given a commercially available supplement in doses similar to those taken by women.

Many women take soy supplements for menopause as an alternative to hormone replacement therapy, as the active components in the supplements are oestrogen-like molecules called isoflavones.

Previous studies in rats have shown that soy isoflavones interfere with oestrogen function in rats, which then disrupts some social and sexual behaviours. Researchers are uncertain whether similar side effects have been reported among women taking soy supplements, however they note that it could be difficult to attribute changes in sex drive to the supplements since the hormonal changes that come during menopause may also cause such symptoms.
New Scientist, 14th November 2003

DR. MERCOLA'S COMMENT: Many people are still convinced that soy is a health food, but it is important to recognize that soy clearly has a downside. So what are some of the other downsides of soy beyond what was mentioned in the article?

Soybeans are high in natural toxins, also known as antinutrients. This includes a large quantity of inhibitors that deter the enzymes needed for protein digestion. Further, these enzyme inhibitors are not entirely disabled during ordinary cooking. The result is extensive gastric distress and chronic deficiencies in amino acid uptake, which can result in dangerous pancreatic impairments and cancer.

Soybeans contain hemaglutinins, which cause red blood cells to clump together. Soybeans also have growth-depressant substances, and while these substances are reduced in processing, they are not completely eliminated.

Soy contains goitrogens, which can frequently lead to depressed thyroid function.

Most soybeans are genetically modified, and they contain one of the highest levels of pesticide contamination of all foods.

Soybeans are very high in phytates, which prevent the absorption of minerals including calcium, magnesium, iron and zinc, all of which are co-factors for optimal biochemistry in the body.

Finally, in an effort to remove antinutrients from soy out of the final product, soybeans are taken through a series of chemical processes including acid washing the soy in aluminium tanks. This leaches high levels of aluminium, a toxic heavy metal, into the final soy products. Many soy foods also have toxic levels of manganese. Soy formula has up to 80 times higher manganese than is found in human breast milk.

Fermented soy products like tempeh, natto and miso and soybean sprouts don't have these problems and can actually be quite healthy. I recommend that you avoid all non-fermented soy such as tofu, soy protein products, soymilk and especially soy baby formula, which should never be used for infants, and only eat fermented soy if you choose to eat it.
www.mercola.com

Further Resources:
Food for Thought by Phillip Day
Available through www.credence.org