What is the composition of the natural nail?

The natural nail is primarily composed of keratin, which is a type of protein that forms fibrous structures. Keratin is a key structural component that provides strength and resilience to the nails, making them hard and durable. This protein is also found in hair and the outer layer of skin, emphasizing its role in forming protective barriers for the body.

The choice that involves pure collagen is incorrect since collagen is a different type of protein that provides structure to connective tissues, rather than the hard surface of the nails. Calcium and vitamins are important for overall nail health but do not constitute the primary composition of the nail itself. Gelatin, although derived from collagen, is not found in natural nails and would not contribute to their structural integrity. Therefore, understanding that natural nails are made of keratin helps clarify the essential characteristics and functions of this important aspect of personal grooming and hygiene in nail technology.