Unless you just emerged from a 50-year coma, you’ve no doubt heard about free radicals and the damage they can do, both internally and externally. These invisible, highly malicious little molecules break down healthy tissue, and are generated by everything from the sun to pollution to that doughnut you ate this morning. In other words: They’re everywhere, and our diets, stressful lifestyles, and polluted environments are exactly what they need to thrive, multiply, and wreak havoc on your face.