> Humans cannot survive as vegans Cite your claims. There are plenty of vegans who are very much alive, and most (but not all) research sugests that well plann

> Humans cannot survive as vegans Cite your claims. There are plenty of vegans who are very much alive, and most (but not all) research sugests that well planned vegan diets can be healthy for all life stages. The most important deficiency in a vegan diet is vitamin B12, but that cannot be produced by any animals (or plants) [0]. Commerically the majority of it is made via bacterial fermentation. [0] http://lpi.oregonstate.edu/mic/vitamins/vitamin-B12 http://lpi.oregonstate.edu/mic/vitamins/vitamin-B12