What is the difference between UVA and UVB rays?
UVA rays are long-rage rays which penetrate deep within the skin’s surface and cause aging and tanning.
UVB rays are short-range rays which burn the skin’s outer layer.
Skin Science
What Does SPF Really Stand For?
SPF (Sun Protection Factor) only represents the protection from UVB (burning) rays. NOT UVA (aging and tanning rays)
How Do We Protect From UVA and UVB Rays?
To protect against both UVA and UVB rays, make sure you choose a broad spectrum sunscreen, and other measures of sun protection such as sun protective clothing, hats, sunglasses, and seek shade.
Who Regulates Sunscreens?
In the United States, sunscreen is regulated by the FDA, and classified as being an Over The Counter (OTC) Drug.
Why Broad Spectrum Matters
A sunscreen with only a SPF rating and no broad spectrum means that you are only protected from the UVB (burning) rays, and not the UVA (aging and tanning rays)
How Do UV Rays Affect Us?
The difference between UVA, UVB, and UVC rays and how they affect us. UVA rays penetrate deep within the skin, causing aging and tanning. UVB rays cause burning.