Which type of radiation is primarily associated with skin aging?

UVA radiation is primarily associated with skin aging because it penetrates the skin more deeply than UVB radiation and is responsible for causing long-term skin damage. UVA rays can lead to the breakdown of collagen and elastin, essential proteins that maintain the skin's structure and elasticity. This damage results in the appearance of fine lines, wrinkles, and overall loss of skin firmness, contributing to the visible signs of aging. Unlike UVB radiation, which is more related to sunburn and surface damage, UVA radiation can cause cumulative changes over time, making it a key factor in premature skin aging.

Infrared radiation and X-ray radiation are not typically associated with skin aging in the same way as UVA. Infrared radiation primarily affects warmth and is less related to skin texture, while X-ray radiation is more concerned with medical imaging and exposure can lead to other health risks, but not specifically to skin aging like UVA does.