For hair that LOVES protein.
Naturalclub.com: "Your hair is made out of a protein called keratin. This protein provides structure to your hair, giving it its shape and strength. Without protein, your hair is limp, lifeless, and weak, and can fall out or fall apart very easily.
Protein balances the moisture in your hair to keep the hair healthy and strong. If you have enough protein but not enough moisture, your hair will be dry, brittle, and stiff. But too much moisture and not enough protein can leave your hair limp, lifeless, and weak (this is known as hygral fatigue.) You need both moisture and protein to maintain healthy hair, which is often referred to as moisture/protein balance."