I know this is an old post but, I recently suffered from protein overload. I actually was becoming used to this brittle feeling as "just dry hair" using daily protein before the overload, but when it intensified AFTER the overload, I realized my hair thrives on a moisture heavy regimen rather than a protein heavy regimen. Now, I may not be protein intolerant but, Im finding now through trial and error that my hair is picky with proteins. Small amounts in one product per day, (amino acids, silk or soy protein at the moment) or every couple of days seems to be ok. I have been modified cg for a year and decided to go full cg following the overload and I cannot believe my hair is so picky with proteins as it is veerrrrrrry fine. This is gonna be tricky.....
3B, Fine, Normal P, Normal E, Low-Med D
LowP: Kinky Curly Come Clean (50% EVOO)
NoP: As I Am CC
RO: Suave Coconut, VO5 Shea Cashmere
LI: KCKT or CJBCLI or HETT/HENOYF (w/ 8 drops GSO)

"To much is given, much is expected"