What’s the difference?
Ultraviolet radiation (UV) is made up of three wavelengths, UVA (UVA1 and UVA2), UVB and UVC. You don’t hear much about UVC, because it doesn’t pose the same threat as UVA and UVB, both of which can cause irreversible damage to your skin.
UVA1 and UVA2 Rays
•MMakes up approximately 95 percent of the UV light that reaches the earth’s surface
•MPresent every day of the year, even during the winter months
•MPasses through clouds and glass (yes, even through your windshield)
•MPenetrates into the deeper layers of the skin, causing damage at the cellular level
•MBreaks down collagen and elastin, resulting in dark spots, sagging and wrinkles
•MPartly responsible for the development of skin cancer
UVB Rays
•MResponsible for surface sunburn and tanning
•MAlong with UVA, contributes to the signs of premature aging
•MAlso plays a significant role in the development of skin cancer
•MDoesn’t penetrate glass
•MIntensity varies by season, location and the time of day
•MStrongest from April to October, between 10am and 4pm
Now that you understand the difference between UVA and UVB rays, let’s take a look at another important factor: Sun Protection Factor (SPF)
