Innovation in inorganic UV filters in sunscreen

There are many benefi ts that are brought by sun, such as positive feeling and mood and trigger the production of vitamin D in skin. But giving to the skin an overdose of ultraviolet rays (UV) may be harmful to our bodies and result in premature skin ageing, skin cancers, eye damage and photoimmunosuppression. UV radiation is made up of three types of rays with different wavelength (λ): ultraviolet A (UVA) (λ = 315–380 nm), ultraviolet B (UVB) (λ = 280–315 nm), and ultraviolet C (UVC) (λ = 100–280 nm). The UVA is weaker than UVB but passes further into the skin. Lately, it was defi ned the Near-UV (HEV) light is just beyond the cut-off from the UVA to the visible region of the electromagnetic spectrum (380 nm-500 nm), being related directly to the degradation of collagen and elastin resulting in formation of wrinkles and premature aging.