Which type of UV radiation is primarily responsible for long-term skin damage?

UVA radiation is primarily responsible for long-term skin damage. It penetrates deep into the skin layers and can cause photoaging, which includes the formation of wrinkles, loss of skin elasticity, and pigmentation changes. UVA rays are associated with the production of free radicals in the skin, leading to oxidative stress and cellular damage over time. They can also contribute to the development of certain skin cancers.

In contrast, UVB radiation, while also harmful, primarily affects the outer layers of the skin and is more associated with sunburn and acute skin reactions. UVC radiation is mostly absorbed by the Earth's atmosphere and does not significantly reach the skin, so its role in skin damage is minimal. Therefore, understanding the effects of UVA radiation is crucial for effective skin protection and care in a facial specialist practice.