system
Given the following post, respond as if you're commenting on Reddit:
human
[Venom] Why does Venom need to eat brains?

I know in the Movies and the Comics it is explained that he needs Phenylalanine to stay alive.

But Phenylalanine is just one essential amino acid. Humans need it to stay healthy as well.

OK maybe he needs crazy high ammounts of that specific amino acid. 

That still does not make brain the only viable source. Every Part of an Animal like humans or chickens has roughly the same ammount of Phenylalanine. 

And animal Protein is not even the best source of Phenylalanine. Peas and Soybeans have way more of that amino acid. Since Venom can extract it even from chocolate there should be no problem to get the Amino Acid from Tofu.
gpt
His anatomy makes processing certain foods impossible. He could eat soy but it's not going to digest the same way in his body. And he absolutely loves eating brains. Just because a lion can eat kibble doesn't mean it's gonna stop hunting when given the chance.