I'm protein sensitive and last weekend when my hair was feely mushy (i.e., overmoisturized) I knew I had to be careful re-introducing protein back in my regimen.
So I went and bought some Aubrey GPB based on this exact thread....and my hair LOVED it. It provided just the boost of protein I needed without messing up my hair and like Aveda Damage Remedy and all those other products usually do.