Is meat eating a possibility?

I have been vegan (no animal products) for over 5 years but recently have encountered many health issues (unable to digest many plant protein, leaving no viable protein to eat), including some meat in my diet seems to be the only option (I can't tolerate any grains or beans anymore). I would try to source as ethically as I could, but it does of course, still involve the killing of another. Is there any way this is acceptable? Or should one sacrifice their health, if necessary?