I'm not sure but I tried IAGirl's Gelatin Protein Treatment. It was weird. When my hair was wet, it was the curliest it's ever been, then when it was dry, it was the straightest it has ever been. It was also soo smooth and soft. Too soft. It felt nice, but not the effect I've been looking for. Am I protein sensitive or have protein overload because I thought your hair was supposed to feel all dry and brittle?