[avocado4]

Human body is complicated - when we think we know something today, it's not uncommon that eventually the evidence will come out proving us wrong. Doctors used to recommend smoking to people for stress release, all based on solid scientific evidence that was available at that time.

So whenever people make a dramatic switch to soy-based diet from a carnivore diet that we evolved with over millions of years, it's always important to acknowledge a possibility of side effects that we don't currently know about.