
31. Your Hair, Skin, and Nails May Weaken
The most abundant protein in your body is collagen, and it is essential to building up healthy skin, hair, and nails. When you do not get enough, especially collagen, those parts of your body begin to break down (via Medline Plus). Your nails may start to fracture, and your hair can become brittle and develop split ends. Elastin, another protein, is critical to maintaining healthy skin, and if you do not get enough, your skin will lose its flexibility (via Eating Well).