well, currently I'm a daytime vegan - mostly motivated by environmental concerns with an evening meat and veg meal.
What i was doing was using pea and brown rice proteins in the daytime, but to mix it up I have incorporated some (organic) tofu meals over the past 6 months and there has been a gradual softening of the chest and belly since (not tits and love handles, but still a change in the wrong direction). Anyway, hardly a scientific study but in my head, the soy's caused it.
I am considering going full time vegan and can't see how I can do this without a soy reliance. What I want to hear is "there is no issue with soy, get on with it" - but only if that is true.