I've heard that prisons design meals that use lots or soy in theory to lower agression in inmates which can cause poor health outcomes. Although I've never seen any evidence that men shouldn't eat soy based diets, considering half the world's population uses it as a main source of protein this is probably bullcrap.

https://www.nytimes.com/2011/11/12/us/soy-diet-is-cruel-and-...