The hair cortex, the central layer of each hair strand, plays a crucial role in its strength, elasticity, and color. Consisting primarily of keratin, a fibrous protein, the cortex is responsible for determining the natural texture and flexibility of hair, influencing hairstyles and overall hair health.
The cortex is sandwiched between the outermost cuticle layer and the innermost medulla, contributing significantly to the overall structure and properties of hair. Understanding its function is essential for hair care professionals, scientists, and individuals seeking to maintain healthy, vibrant hair. One notable advancement in hair science was the discovery of the cortex's role in hair color, revealing the intricate mechanisms behind natural pigmentation and the development of hair dyes.





