A free radical is an atom with an unpaired electron in its outer shell, causing the atom to be highly reactive. If free-radical scavengers (antioxidants) aren’t available, the free radical can steal an electron from another molecule, triggering a chain reaction for the formation of more free radicals. This can result in damage to the cell membrane or DNA, leading to cell death or tissue injury. UV light, inflammation, metabolism, air pollution, smoking and radiation can all lead to the formation of free radicals. Free Radical Oxidative Stress can lead to skin aging, asthma, macular degeneration, arthritis, heart problems, and a host of degenerative diseases.