system
A chat on 4chan
human
There seems to be a lot of confusion and for some unknown reason anger over this issue, so I'll just say this once and not gunna reply to anyone.

Anyone saying they know for certain a human's nutritional needs is probably getting their information from the FDA. This government body is corrupt as fuck and cannot be trusted for unbiased factual information. They flip flop on things all the time, not because of scientific fact, but because they're trying to manage the nations food resources, but by trying to do this they've opened themselves up to being influenced by the foods economy. That is to say, they're in the pockets of corporations who tell people what's good and safe to eat and tells people how much of what to eat. The idea that everyone needs to eat as much meat as possible all the time came from meat lobbyists. Meat is a very large market in the US, so naturally their lobbyists have much sway, influence, and power. You will not find untainted information on this subject. Never. It does not exist in any place you have access to.
gpt
Goodpoint to about FDA 

Read Dr. Weston Prices studies on tribes and diets and health