The sunlight that reaches us is made up of two types of harmful rays: long wave ultraviolet A (UVA) and short wave ultraviolet B (UVB). UVA rays penetrate deep into the dermis, the skin’s thickest layer.
UV radiation from the sun is in three wavelengths – UVA, UVB and UVC.
UVC does not penetrate the earth’s atmosphere, so we only really need to protect against UVA and UVB.
UVB causes sunburn, which has strong links to malignant melanoma and basal cell carcinoma risks (skin cancer). Therefore, having a Sun Cream with a high SPF (sun protector factor) will help prevent the skin from burning and the damage that will cause skin cancer.
UV irradiation also affects the elasticity and sun-induced skin ageing such as wrinkles, leathery skin and brown pigmentation, as well as skin cancer.
UVA can penetrate through glass and skin more deeply than UVB. UVA protection in a Sun Cream will help protect the skin from photo ageing and hopefully skin cancer.