What's the difference between UVA and UVB rays?
As UVA can penetrate into the deeper layers of the skin, this means it plays a major part in our skin aging and wrinkling, as Dermalogica therapist Jane explains, as it affects the collagen in the deeper layers of our skin. This can cause the skin to lose its elasticity and firmness. UVA damage can be unseen for months or for years and can be anything from imperfections, wrinkles, right through to melanoma and skin cancer.
UVB has a shorter wavelength but a stronger intensity. We’re a bit more used to UVB. This is what causes our skin to burn in the sun. If you’ve ever had a day in the sun and come home with reddened shoulders or a peeling nose, you know some of how UVB can affect your skin. The short term damage of burning the skin, blistering and other issues can lead to our skin ageing too, and also other skin complications, as it causes damage to the outer layers of the skin.
We need protection against both UVA and UVB rays to keep our skin healthy.