The Hair Shaft is the visible part of the hair that extends above the surface of the skin. It is composed primarily of keratin, a protein that provides structure and strength to the hair. The shaft plays a crucial role in the appearance and functionality of hair.

Structurally, the hair shaft consists of three layers: the cuticle, cortex, and medulla. The cuticle serves as a protective outer layer, while the cortex provides strength and color. The medulla, present in thicker hairs, contributes to elasticity and texture.

The health and condition of the hair shaft are influenced by factors such as genetics, nutrition, and environmental exposure. Damage to the shaft can lead to issues like split ends, breakage, and dullness.

Maintaining hair shaft health involves proper care routines, including regular conditioning, minimizing heat exposure, and protecting hair from harsh chemicals. A healthy shaft contributes to strong, shiny, and manageable hair.