Antioxidants are molecules that provide your body with an additional layer of defense to fight compounds that harm your body and cells. The harmful compounds are called free radicals.
Free radicals are caused by internally by factors like inflammation or external factors, like smoking or overeating. Free radicals attach to your cells and harm the DNA, leading to diseases like cancer, arthritis, stroke, and other inflammatory conditions.
Antioxidants are common in foods called superfoods, and present in many plant foods due to their high vitamin levels.
Important antioxidants are vitamin C, vitamin E, and flavonoids.