Does Soy Protein cause 'feminization' of men?

Does Soy Protein cause 'feminization' of men?

Several conflicting studies have been published concerning the side effects some men have experienced consuming soy protein.

One study, based on the consumption of over 100 grams of soy protein per day found that 'feminization' in men did occur in a statistical significant percentage over those in the placebo group. This included enlarged/sensitive breasts, reduced testosterone production and libido. One good side effect was that hair loss seemed to diminish.

Another study, based on consumption limited to a maximum of 50 grams of soy protein/day, found no occurances of such feminization side effects. In fact, the isoflavones and phytoestrogen found in soy protein were determined to, in some men, increase testosterone levels due to the body counteracting the introduction of these female 'phytoestrogen' into their systems.

The bottom line is that several studies have shown that a balance of whey, egg, casein, and soy proteins is recommended because it closely mimic the amino acid profile of human tissue. There is no need to consume more than 50 grams of soy protein/day so limit yourself to that amount and supplement the balance with whey, egg, and casein proteins. There are many choices to choose from but one locally sourced brand is Body for the Ages Protein powder. It is available for purchase online at www.bodyfortheages.com.