Types of UV Rays
Sunlight contains three types of ultraviolet rays: UVA, UVB, and UVC.
UVA rays cause skin to age and wrinkle, as well as skin cancer such as melanoma
UVB rays are also dangerous, causing sunburns, cataracts, immune system damage, and contributing to skin cancer. Melanoma is the most dangerous form of skin cancer, it is thought to be associated with severe UVB sunburns that occur before the age of 20
UVC rays are the most dangerous, but fortunately, these rays are blocked by the ozone layer and do not reach the earth.
How Do Sunscreens Work?
Besides avoiding unnecessary sunlight exposure, another method to protect you is to use a protective sunscreen in order to minimize the penetration of the UV rays. Sunscreen works by absorbing, reflecting, or scattering the sun’s rays on the skin, all sunscreen are labeled with SPF figures. The higher the figure the greater the protection is form sunburn. Some sunscreens are labeled “broad-spectrum” this indicated that it provides protection from both UVA and UVB rays.