Cracked nails seem like a small inconvenience — a split here, a snag there — but they often reflect deeper signals from your body. Nails are made of keratin, the same protein found in skin and hair, ...

One day your manicure looks so good, you wonder if you’ve missed your calling as a hand model. The next day, you start to notice that your nails have started to split and peel. What’s going on? “The ...