I don't know, I'm not a nutritionist and it's not something I have to worry about.It takes like 4 quorn steaks to get as much protein as 1 8oz sirloin. I really don’t like tofu either, so where would that leave me
But there are millions of vegans who manage to get what they need, probably many of which have the same medical condition as you. I imagine it will be difficult but if you had the conviction it might just be possible?
Again and again I will say though if you literally had no other option and needed meat to survive then I would say it's justified.