Fact: human hair is 91% protein. So exactly why is everyone (for the most part) always going on about how to deliver more moisture to our strands? Shouldn’t we be also talking about protein? Yes, yes we should. Here’s the thing about moisturizing hair treatments- we do occasionally need them. Most everyone needs adequate moisture or water content for the protein fibers that make up the hair to feel soft and pliable. But we also need protein and here's why.