This enhances the supplement’s protein content to 90 to 95 percent protein. This process also ensures that the powder supplement is carbohydrate and fat-free. Thus, these supplements are equal in quality to animal products. Moreover, soy protein powder supplements are made from de-fatted soybean flakes that have been washed in either alcohol or water to remove sugars and dietary fiber. Hence, these soy protein powder supplements are almost fat free and contain no cholesterol.

The content of bio-active components in soy protein powder supplements varies from product to product. These bio-active components are believed to relieve menopausal symptoms, maintain healthy bones, and prevent prostate, breast, and colorectal cancers.

Another advantage of these powder supplements is the removal of anti-nutrients found in natural soy protein. This is because the manufacturers isolate them or reduce their activity during processing.

One such supplement is soy protein isolate. Although, the health benefits of soy protein powder supplements have been vastly documented, the adverse affects of these products have not been widely published. However, the earlier section on long term effects of soy products discusses the health problems caused due to consumption of these supplements.

America's leading alternative doctor, Dr. Andrew Weil, had this to say about soy,
"…you're unlikely to get too many isoflavones as a result of adding soy foods to your diet -- but you probably will take in too much if you take soy supplements in pill form. At this point, I can only recommend that you avoid soy supplements entirely."

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