But free radicals are not all bad. In fact they can help the body to fight viruses, bacteria and toxins! For example, Leucocytes (white blood cells) produce free radicals to kill such pathogens. It is when free radical production outside of normal metabolic processes takes place that we suffer oxidative stress, for example, toxins, injury, infection, extreme sun exposure, stress, radiation, and excessive exercise.
Oxidative stress can harm the cells causing damage and cell death. When this happens we are exposed to premature ageing, inflammation and degenerative diseases such as cancer, arthritis, Alzheimer’s and arteriosclerosis.
So, back to antioxidants…
The term antioxidant is really more of a chemical property, referring to its ability to act as an electron donor to free radicals. Each one has a unique chemical behavior and properties of their own. This means we need to make a range of them available to the body. Some of them are produced naturally in the body through the metabolism such as glutathione, ubiquinol, melatonin and uric acid, as part of normal metabolism, and others are found in the diet, the most well-known ones being Vitamins E, C and B-carotene.
However as we age even those normally produced by the body become diminished, and we become more vulnerable to disease.
Nonetheless taking antioxidants in large quantities from artificial means has not shown great success in clinical trials. Antioxidants should be taken in their natural form or produced by the body, for their best defense against disease.
An organic diet rich in fruit, vegetables, herbs, spices, nuts, seeds and green tea will provide a rich natural source of powerful antioxidants that cannot be made by in the cells.
One thought on “What Are Antioxidants and Why Do We Need Them?”
Good piece, informative and helpful. I think more people are aware of the term ‘antioxidants’ than they may be by the term ‘free radicals’ but understanding how one helps eliminate the other and what is the best way to obtain antioxidants is very educational.
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