yeah I didn't want to into grand detail for me I figured out it was the estrogen thing; soy promotes it and products that promote estrogen in me 'mess me up' (can't explain how, just 'don't feel right'). But things that promote testosterone (Zinc mostly) I do fine on. Then again, I drink lots of coffee - the copper (brown color) also leads towards estrogen and that doesn't give me any trouble. But maybe the straight metal isn't as dramatic of a difference as the .. proto-estrogens or whatever they're called in soy. Or maybe coffee doesn't have as much.. When I have too much chocolate /cocoa (which is loaded with copper), I get similar body effects as I do with soy, so maybe... I dunno. The GMO part about soy doesn't bother me as much. I suppose it should but GMO never bothered me much. It's anathama to say so around some people I know but yeah.d