UV Damage of the Hair

The document discussed how excessive sun exposure led to structural damage to the hair shaft, primarily through photochemical processes. UVB radiation caused hair protein loss, while UVA radiation led to color changes. This damage was due to the degradation of hair proteins and pigments, with free radicals playing a significant role. Melanin in the hair provided some protection by absorbing UV radiation and immobilizing free radicals. The importance of protecting the hair cuticle to maintain hair integrity was emphasized, and the use of hair care products with UV filters was suggested as a preventive measure. Research at the time focused on developing products to prevent such damage.