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Home » Q & A » Soy Protein
Question: Negative effects of soy protein in men?
Question Description:
Without thinking about it (except to compare the price of soy supplement mix to that of whey supplement [costlier]), I've been drinking soy protein isolate shake mix after having had wisdom teeth taken out last week. As a source of protein, since I read that a high-protein diet can help in such healing.Then I noticed a complete drop-off in libido. Initially saw this is in a neutral context. Neither here nor there.After searching the subject online, however, I find that some sites (bodybuilder types) advocate against men consuming soy protein (due to its proven ability to reduce testosterone levels and introduce estrogen chemicals, I guess), and some bodybuilder types claim that its effects on testosterone and sperm levels could be permanent.Although the current side effects are interesting, should I stop consuming it altogether? My plan was to have it until my gums healed next week; but if the damage is permanent, I'll cease. Just wondering what's true and what's not.After now reading a few more studies, I think it's best to be on the safe side and return my soy protein for some whey protein.I checked the labels of all the nutritional drinks and so on that I've consumed the past week and a half -- I think I've eaten a ton of soy protein isolate. Yikes.I just hope the effects aren't permanent. Any experiences/stories would be appreciated, as it relates to whether a return to normal libido should be expected after ceasing consumption. I just never had a chance to make a (lifelong) decision as a consumer based on side-effect criteria, since I didn't know the side effects.
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Answer#1: There is no scientific basis for this claim, I was drinking 50-10 grams of soy protein for a long time, for much the same reason as you, price. I have recently found a place to buy cheaper plain whey protein so I mix mine 50 percent whey and 50 percent Soy. In any event all of the things your reading about have to do with the fact that soy protein is very chemically similar to that of estrogen. However there have been several studies that have looked at this, and I have yet to find one that indicates any correlation. There are lots of things that are chemically similar that don't have the same effects. I wouldn't stress about it to much.
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