Oxidative stress is now recognized as a leading cause of chronic disease and aging. It occurs when free radicals — toxic oxygen molecules produced by normal body processes but also via external sources like stress and pollution — spiral out of control.
Even the healthiest among us have free radicals in our systems. However, free radicals are normally kept under wraps where they cannot cause great harm to the body. When free radicals exist in your body in excess, the harmful condition known as oxidative stress occurs.
“There is evidence that free radicals are a predominant factor in the etiology of a wide range of diseases and conditions such as cancer, diabetes, atherosclerosis, Alzheimer’s disease and rheumatoid arthritis,” says free radical and antioxidant expert Li Li Ji, Ph.D. of the University of Wisconsin in Madison.