Turns out that the protein in gelatin is a great match for your hair and nails. Eating gelatin helps the health of your hair and nails. Using gelatin on your hair also helps, as your hair can actually absorb it. Your hair is technically dead, but that doesn’t mean it can’t absorb – and retain – the protein. That’s what makes this recipe so good for your hair. With three ingredients and a little water you have a mask that will put that soft baby feel back into your hair.