How does sun exposure lead to premature aging?

Sun exposure leads to premature aging primarily through its damaging effects on collagen and elastin fibers in the skin. These fibers are essential for maintaining skin’s structure, elasticity, and firmness. Ultraviolet (UV) radiation from the sun penetrates the skin and disrupts the natural production and structure of collagen and elastin. Over time, this degradation results in a loss of skin’s youthful appearance and contributes to wrinkles, sagging, and other signs of aging.

The other options do not accurately reflect the direct mechanisms by which sun exposure affects skin aging. While sun exposure can lead to dryness, this effect is not the main contributor to premature aging. It also does not primarily cause the skin to become oily or promote rapid skin healing as key factors in aging. Understanding the specific role of collagen and elastin damage highlights the importance of sun protection in skincare to maintain skin health and appearance.