
17. Don’t smoke.
Cigarette smoke contains carbon monoxide, which displaces the oxygen in your skin, and nicotine, which reduces blood flow, leaving skin dry and discolored. Cigarette smoking also depletes many nutrients, including vitamin C, which helps protect and repair skin damage. Smoking can speed up the normal aging process of your skin, contributing to wrinkles. These skin changes may occur after only 10 years of smoking.

Aside from age, smoking is the strongest predictor of facial wrinkling in men and women. Quitting increases the oxygen and nutrients sent to your skin cells, leaving you with smoother, more supple skin. And while your skin will look younger, you’re not just turning back the clock on your appearance. Quitting smoking before the age of 40 decreases your risk of premature death by 90 percent.