

I have the same but only with beef. Pork and lamb are fine.
I think with the allergy it’s the myoglobin which content defines what is a Red meat. (edit: it’s not the myoglobin, it’s a specific sugar structure, reading the article mightve helped) My issues to digest beef is more likely related to the structure itself, the “long fibres”, because minced beef is completely fine.
Cow milk is for cow babies, human milk for human babies.