Sun Protection 101- What you need to know about the ingredients in your Sun Protection Product
There are three kinds of UV (ultraviolet) light that comes from the sun. UVA has longer wavelengths and penetrates further into the dermis which is why it can cause DNA damage. UVB has shorter wavelengths and is responsible for sunburns. UVC has an even shorter wavelength, but is absorbed by our ozone layer so is not a cause for concern.