Sun exposure vs smoking: Which ages your skin faster? Dermatologist explains

Skin ageing is a natural process, characterized by the appearance of wrinkles, fine lines, and pigmentation. However, certain habits can hasten this process. Sun exposure and smoking are two common factors often blamed for premature skin aging. According to Dr Sunil Kumar Prabhu, a dermatologist at Aster RV Hospital, both sun and smoking harm the skin differently, and understanding these differences can help in protecting the skin.

UV radiation, a key component of sun exposure, is a major cause of premature skin ageing. UV rays penetrate deep into the skin, damaging essential fibers such as collagen and elastin, which maintain skin's smoothness and elasticity. When these fibers deteriorate, the skin loses its ability to heal itself, leading to wrinkles, sagging, rough texture, uneven tone, and pigmentation.

Dr Prabhu explains that chronic UV exposure triggers inflammation and oxidative stress, further accelerating cellular ageing. Over time, unprotected sun exposure can cause long-lasting structural damage, making the skin appear older than its actual age.

Smoking, on the other hand, ages the skin in a more subtle but equally damaging manner. It impairs blood circulation, reduces the supply of oxygen and nutrients, and increases oxidative stress, which dries out the skin and hampers repair. This leads to slower collagen formation and delayed wound healing, resulting in dull, uneven, and lined skin.

Dr Prabhu notes that heavy and regular smokers often develop deeper wrinkles, a grayish skin tone, and noticeable loss of firmness. Even occasional smokers experience premature ageing over time due to oxidative stress. While sun damage affects larger areas of the body and penetrates deeper, smoking mainly impacts the face but exacerbates the signs of ageing caused by sun exposure.

Both sun and smoking can be mitigated with conscious care. Using sunscreen, wearing protective clothing, and limiting sun exposure, along with quitting or reducing smoking, can significantly slow down premature skin ageing. Dr Prabhu emphasizes that the goal is not just to avoid wrinkles, but to preserve the skin's health and repair mechanisms. By combining sun protection, a smoke-free lifestyle, and proper skincare routines, the skin can maintain its natural elasticity, tone, and youthful glow for a longer period.