if your so allergic to them in your food i would definitely not be putting any in your hair there are different kinds of proteins as well. if im not mistaken there are animal proteins and plant proteins (i think!) maybe you can handle plant protein but not animal protein

my hair: 3b, high porosity, high density and coarse hair (i think i finally figured that all out)
my hair loves conditioner only styling!
Oils and my own procuts are my hairs best friend
my hair goal length is bra strap length when curly.