Also common to animals. The same argument applies here as that for Pathogenic Micro-Organisms. Organoleptic Indications of Pathogens. The correlation is an epidemiological fact. Yet most meats, when cooked, produce an array of benzenes and other carcinogenic compounds.
Cancer is infinitely easier to prevent than to cure.
Soybeans, for one, contain protease inhibitor, a powerful anti-cancer compound. You won't find it in useful quantities in animal food. Kidney Stones and Gallstones. Aggravated by animal foods. Vegetarians tend to be thinner than meat-eaters, and studies contain it.