I'm allergic to the CK as well; I think it is the glycerin in it.
It makes me itch to the point that I feel like I have lice.
A natural alternative for me was Jane Carter's Condition & Sculpt. It isn't quite as frizz fighting as CK, but I found if I used it after my leave-in and before my hair stylers it helped. I didn't use it as a styling product, more as a frizz fighter. The other product that I have been able to get away with is Curlisto's Structura Lotion. I used it in the summer on those really sticky days. I don't think it is CG though.
Type: 3a fine & dense,with normal porosity, terrible product junkie
ROUTINE: LI, enhancer, gel, plop with Curlease towel, serum product (either CIAB or Gel-les'c), clip & diffuse.
Too many favourite products to list ... I finally have my routine that works and alot of products to choose from. My product stash is huge, but well loved !!!