It's not healthy to only eat vegan food without monitoring and supplementing vitamin B12. A nutritional vitamin B12 deficit can go unnoticed for years - when it is noticed damage has already been done. Humans are omnivores that need animal food sources from time to time (although it does not have to be meat).

Also I don't understand vegan ideology. Why should it be any more acceptable to slaughter plants than animals? Just because animals are more similar to humans than plants and evoke feelings of pity that plants do not? Plants are also living creatures! Assuming that slaughtering plants is acceptable while slaughtering animals is not is therefore a prime example of ideology-based Darwinism.

ya.ya.yo!