I don’t know if this is what OP was referring to, but an allergy to red meat is a real thing: https://en.m.wikipedia.org/wiki/Alpha-gal_allergy https://en.m.wik

I don’t know if this is what OP was referring to, but an allergy to red meat is a real thing: https://en.m.wikipedia.org/wiki/Alpha-gal_allergy https://en.m.wikipedia.org/wiki/Alpha-gal_allergy