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, ...

Your fingernails might seem like simple protective coverings for your fingertips, but they’re actually sophisticated diagnostic tools that can reveal crucial information about your protein intake.

Medically reviewed by Susan Bard, MD Peeling nails can happen because of too much or too little moisture, aging, or damage ...