Free radicals are unstable molecules formed by regular bodily functions, environmental aggressors, smoke, and pollution. These molecules look to pair with a missing electron. In doing so, they latch onto your skin and create a negative chain reaction on the skin’s surface, causing damaged cells. Aside from genetics and time, free radicals are one of the leading causes of sagging skin and fine lines. The best way to protect your skin from this type of damage is by incorporating antioxidants like vitamin C in your skincare routine.