It has panthenol, but I think that's debatable as to whether or not it's protein. I did some research and came to the conclusion that it isn't. Have you tried the SM Yucca Aloe shampoo? I have that one too and it's just as good. It has vegetable protein though. I bought it because they were out of stock on the MR one and I'm glad I did. It's nice to have options. Next I'll try the Curl & Shine one, but I've gotta make my way through these two bottles first. Might be a year from now.
3A - C, HP, ME, HD. (Coarse, High Porosity, Medium Elasticity, High Density.)

CG since Nov. 2012

Poos: SM Moisture Retention + Yucca Baobab, TJ's Tea Tree Tingle
Condish: TJ 'sTea Tree Tingle*, SM Moisture Retention* + Curl & Shine + Yucca Baobab, Yes to Blueberries
Stylers: KCKT*, SM Curl Enhancing Smoothie* + Curl & Style Milk*, KCCC*, FSG*, CJ Pattern Pusha, Curl Keeper
Sealers: Jojoba* or Grapeseed* oil

* = HG