Compounding the damage from mechanical, thermal and chemical alterations of hair, environmental exposure from UV, humidity and pollution further degrades the weakened fiber.
Hair is a highly organized and complex visco-elastic biopolymer composite of primarily keratin. It is anchored by the follicle that undergoes a process of regeneration, controlling the production and growth rate of the hair fiber. The hair structure is composed of a cuticle, cortex and medulla, although the medulla is not always present, especially in fine thin hair.
