Cosmeceuticals for Hair and Nails

Hair cosmeceuticals primarily interact with the hair fiber surface, cuticle, and cortex, especially in damaged hair. Despite stringent regulations, practitioners need to guide patients on the use of these products. The cuticle, composed of thin, flat cells, protects the cortex and anchors the follicle, while the cortex, making up most of the hair fiber mass, consists of thin, long cells that provide mechanical strength through their interdigitated structure.