Which is worse UVA or UVB?

UVA rays penetrate deep into the dermis, the skin's thickest layer. Unprotected exposure can lead to premature skin aging and wrinkling (photoaging), and suppression of the immune system. UVB rays will usually burn the superficial layers of your skin. It plays a key role in the development of skin cancer. read more

UVB rays are responsible for causing most skin cancers. While large doses of UVA rays can contribute to cancer, it's the UVB rays that are commonly to blame. If you've heard the advice to stay out of the sun though the mid day hours, it's the UVB rays you're trying to avoid. read more

UVA & UVB. For a six billion-year-old star, the sun is certainly in the news a lot lately, mainly because it is still a source of uncertainty and confusion to many of us. The center of this confusion is the sun's ultraviolet A (long-wave) and ultraviolet B (shortwave) rays. read more

First, you need to know the difference between UVA and UVB rays. UVB Rays — Building Rays. UVB rays are known as the building rays. This specific type of short wave ray builds melanin in your skin. Melanin is what produces the natural base tan and color in humans. read more