What is the primary cause of skin aging?

The primary cause of skin aging is sun exposure, particularly ultraviolet (UV) radiation. This exposure leads to a process known as photoaging, which causes structural changes in the skin. UV radiation damages the DNA in skin cells and results in the breakdown of collagen and elastin, key proteins that maintain the skin's firmness and elasticity. Over time, this damage manifests as wrinkles, fine lines, discoloration, and a decrease in skin texture.

While genetic predisposition, poor diet, and lack of sleep can contribute to the aging process, sun exposure has a more direct and significant effect on the skin. Genetics can influence the rate at which aging occurs, and factors like diet and sleep can impact overall skin health, but the overwhelming evidence points to UV exposure as the primary environmental factor triggering the visible signs of skin aging. Protecting the skin from sun damage through the use of sunscreen and protective clothing is essential in mitigating these effects and promoting healthier, more youthful-looking skin.