I've read about this issue as well-- there was a good article in the Utne reader on it a while ago, I'll see if I can track it down to share with everyone.
The basic idea, though, was that soy is beneficial to your health if you consume it whole, and it's best after it has gone through some sort of fermentation process. So tofu, tempeh, miso, natto are the best bets, followed by whole soy beans (edamame), etc.
The article said that the trouble comes up when you are consuming too much isolated soy protein, as in the protein powder, TVP, any kind of soy-based meat or cheese alternative, and the like.
And I used to drink soy milk daily for about 3 years, and was experiencing a lot of digestive problems, among other things... my naturopath suggested that the soy milk could be the cause (it's basically just raw beans and water, after all), and after switching to almond and rice milk over the last 2 years, I have noticed a change in the right direction! Although, I've also been trying to be more careful about what I eat overall, and getting more exercise, so... go figure. : )
Whew, sorry to go off on the subject!
Anyway, I'll try to find that article, as I found it very helpful, with convincing evidence to support it.
If we repay our enemy with charity,
our enemy will cease to exist.
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