How does the keratin in natural nails compare to that in hair or skin?

Keratin is a type of fibrous protein that is a key structural component in various parts of the body, including nails, hair, and skin. The keratin found in natural nails is harder than the keratin present in hair or skin. This hardness comes from the tightly packed and cross-linked structure of the keratin fibers, which provides strength and durability essential for protecting the fingertips and supporting nail growth.

In contrast, the keratin in hair is composed of softer structures that are more flexible and pliable, allowing for the bending and movement that hair undergoes without breaking easily. The keratin in skin serves as a protective barrier but is designed differently to allow for elasticity and regeneration. Therefore, the hardness of nail keratin renders it distinct from both hair and skin keratin, emphasizing its specialized function and resilience.