If you’ve ever tried to grow out your hair or nails and failed then you probably were lacking some proteins your body needs! Although not the most important reason, we need protein because it’s what our hair, nails, and top layer of skin are made out of. In order for the proteins to make things like your hair and nails grow you have to have extra protein to spare. If your body needs proteins for repairing cells or you’re not getting enough of them then there’s nothing extra to put into your hair and nails. This means though that if you have extra protein that your hair and nails will grow faster!