Here's a breakdown:
* Keratin: The primary component of nails, giving them their strength and hardness.
* Water: Nails contain a small percentage of water, contributing to their flexibility.
* Trace elements: Tiny amounts of other elements like sulfur, zinc, and iron are present in nails.
It's interesting to note that the keratin in nails is different from the keratin in hair. Nail keratin is denser and more tightly packed, giving nails their rigidity.