When iron reacts with oxygen it forms a chemical called rust because it has been oxidized. Biological oxidation is the gradual ageing process of the body. Oxidation basically occurs all over the body and at a cellular level. There is an oxidation reaction theory that states that oxygen eacts within the body and produces by-products called free radicals.
Antioxidants are substances that may protect your cells against the effects of free radicals — molecules produced when your body breaks down food or is exposed to tobacco smoke and radiation. Free radicals may play a role in heart disease, cancer and other diseases.
Several stress factors and lifestyle habits are known to promote free radical formation and oxidative stress:
Air pollution,Cigarette smoke, Alcohol intake.
Toxins -High blood sugar levels
Radiation, including excessive sunbathing.
Infections by bacteria, fungi or viruses.
Too little or too much oxygen in the body. Sun exposure depletes naturally occuring antioxidants. This is why dermatologists will often prescribe a topical antioxidant cream or lotion to protect the skin during the day.
The process of oxidation & Free Radicals in the human body damages cell membranes & other structures, accelerates the ageing process, inflammation in joints (arthritis), damage to nerve cells in the brain.