Innovation in inorganic UV filters in sunscreen
WHY SUN PROTECTION IS IMPORTANT?
There are many benefits 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 photo-immunosuppression.
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 defined 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.
IMPORTANCE OF THE INORGANIC SUNSCREENS
Sunscreens are a form of photo-protection most widely used by the public to reduce UV damage. They contain UV filters, organic and inorganic, aiming specifically to filter the UV light to a certain le ...