It's a fruit oil. And it's very low on the ingredient list. It may be a derivative from a protein like a 3rd cousin or something, but all SN conditioners except the coconut one are well known around here as protein free. Don't mean to sound snarky or anything but I just don't buy that that tiny of an amount of something that is not directly a protein would cause anyone problems. If I obsessed over ingredients to the nth degree id go insane.

It does not have anything that jumps out as a substantial amount of true protein.
fine, thin, normal/(low?) porosity. Mod-CG. Usually I can't co-wash more than 1x a week, & sometimes I have to use T-Gel in rotation due to scalp issues.

Co-wash: VO5 Volumizing
Poo: Giovanni 50:50
RO:TN, Nexxus Youth Renewal, Alba Coconut
LI: KCKT
PT: gelatin PT, ION EC
Stylers: Giovanni mousse, TIGI Curls Rock amplifier (a-cone), Curls Rock Strong Hold Mousse
Gels: SCC spray gel