Oxidative stress is a direct consequence of an excess in the body of so-called free radicals—reactive, unstable molecules that contain oxygen. Free radicals are normal metabolic by-products and also ...

Free radicals are atoms that attach to healthy cells in your body, damaging them in the process. You can encounter free radicals in the environment from things like smoke and alcohol. Combat the ...

Electronic cigarettes—or vapes—can release puffs of vapor in aromatic clouds. The health risks of breathing in this ...

We got the lowdown on these mysterious, skin-wrecking molecules. So, really—what are free radicals? The Chemistry 101 answer is that free radicals are atoms or molecules with an unpaired electron.