8. Smoking and Exposure to Secondhand Smoke

Tobacco smoke, whether from personal use or secondhand exposure, is a major contributor to premature skin aging. The toxins in smoke constrict blood vessels, reduce oxygen supply, and break down collagen—leading to wrinkles, sagging, and a dull complexion. Studies have shown that smokers and those exposed to smoke develop deeper lines and uneven skin tone much faster. Non-smokers typically retain firmer, brighter skin for longer. Avoiding all smoke exposure is crucial for preserving a youthful appearance.