Protein treatments are often used to restore dry, damaged hair. They strengthen hair and make it less prone to breakage. Our hair is composed of about 90% protein, and believe it or not, some people don't need to do these treatments if their hair naturally produces the right amount of it. I, on the other hand, desperately needed to do this. My hair felt so much happier afterward. I plan to add protein treatments to my hair regimen & treat it every 2 weeks. The mayo smell is quite strong, but easily washes out! I strongly encourage everyone to try this homemade treatment.