My hair only likes keratin - I've actually had the Brazilian keratin treatment and my hair was gorgeous (though not worth the money, time, and exposure to chemicals).
Wheat and soy it reacts to almost immediately - dry, flyaway, brittle, loss of curl pattern.
Coconut it will tolerate for awhile but then goes to the reaction like wheat.
Silk amino acids are tolerable, but do not do anything great, and I've never used them for long enough to really see what they do.
I haven't tested the reaction to any other proteins, but since keratin works and my low-porosity hair doesn't require much protein, I've just removed everything protein-containing except my GVP K-pak (which I use around my coloring).
Mod CG since 5/10, 2b/3a, med width/density, low/med porosity, greying since 18, color over grey since 21
Hair hates: non-keratin protein, glycerin, sorbitol, agave, sulfates, polyquats, co-washing (flaky scalp), maybe aloe?
Hair loves: fewer/more natural ingredients, moisture
Scalp wash: Selsun Blue naturals or reg when desperate
Low poo: Giovanni TTTT
RO: SN - Strawberry, ES
Style: HETT mousse, FSG if I make it, ??