plants do not provide enough nutrients. sorry vegans and vegetarians they just don't. duuhhhh that's why we've evolved to where we are!!!!! I don't know why vegetarians and vegans don't understand that. There's a hierarchy with animals, and humans are animals! Vegans want to act like we're some superior beings that are just in a completely different realm than animals. Guess what, dicks?! We're not. We're meant to eat meat, sorry. My friend was vegan for like 2 years mostly because she had a legitimate eating disorder (anorexia), and she said it fucked with her brain function. Not surprised