What is a common cause of signs of aging in the skin?

Sun exposure is a significant factor contributing to signs of aging in the skin, often referred to as photoaging. UV rays from the sun damage the skin at the cellular level, leading to the breakdown of collagen and elastin fibers, which are essential for maintaining skin's elasticity and firmness. This damage manifests as wrinkles, fine lines, and age spots, all of which are common indicators of aging.

Unlike sun exposure, excessive hydration typically helps maintain skin health, while regular exfoliation can improve skin texture and promote cell turnover, delaying signs of aging. A high-protein diet, on the other hand, is not directly linked to aging skin and can actually promote the repair and growth of skin cells if balanced correctly. Therefore, sun exposure stands out as the primary cause of premature aging in the skin due to its detrimental effects on skin structure and integrity.