Discount Vitamin | Discount Supplement

House of Nutrition
Vitamin Shoppe
Vita Springs

Coupon Codes

Store Comparison




Balance Bar
Carlson Labs
Country Life
Enzymatic Therapy
Gaia Herbs
Garden of Life
Greens Plus
Jarrow Formulas
Maitake Products
Natural Factors
Naturally Vitamins
Nature's Plus
Nature's Way
New Chapter
NOW Foods
Power Bar
Rainbow Light
Solgar Vitamins
Source Naturals
Zone Perfect



Health Benefits of Berries

Food Supplement Guide

Dietary Supplement

Recommended Daily Allowance of Vitamins






Home > Antioxidants

Antioxidant Supplements

What are antioxidants? What do they do?

Antioxidants help to protect our body from free radicals.  They are also known as free radical scavengers.  Free radicals are compounds that have an uneven number of electrons.  They are unbalanced and reactive, and would attempt to gain stability by stealing an electron from other compounds.  Free radicals can damage DNA, protein, and fats, causing many degenerative diseases such as aging, cardiovascular diseases, immune dysfunction and cancer. 

Free radicals are produced by different means, including external and internal factors.  External factors include radiation, UV, environmental pollutants, cigarette smoke, bad diet (frying foods).  Internal events such as immune cell activity and respiration also produce free radicals. The most dangerous free radicals are  superoxide radicals (O2˙-) and hydroxyl radicals (OH˙). Other free radicals include the peroxyl radicals (RO2˙) and the alkoxyl radicals (RO˙), both are involved in the oxidative damage to fats.

Antioxidants protect the body from free radical damage by giving up one of its electrons to free radicals or DNA and fatty acids that have lost an electron, thus neutralizing the damaging effect.  Since we are bombarded by large number of free radicals each day, we have to maintain an ample supply of antioxidants to protect ourselves from free radical damage.


Sources of antioxidants

Our body produces many natural antioxidant compounds, including superoxide dismutase (SOD), catalase,  glutathione peroxidase, glutathione, proteins and uric acid.  We can also obtain antioxidants such as flavonoids, vitamins C & E, beta-carotene from the diet.  Foods high in antioxidants are fruits, vegetables, tea and herbs. 

Most people think of vitamins A, C & E as strong antioxidants.  But in fact, other antioxidants such as superoxide dismutase, glutathione, alpha-lipoic acid, N-acetylcysteine (NAC), flavonoids, curcumin, lignans have much stronger antioxidant activity than these vitamins. These compounds can convert free radicals to inert or even useful substances without becoming free radicals themselves.  They can also restore the antioxidant properties of vitamins A, C & E after these vitamins have donated their electrons to free radicals. 

Selenium and zinc are not antioxidants themselves but are integral components of antioxidant enzymes, therefore, these minerals also play an important role in our defense against free radical damage.


Which antioxidant supplements should you use?

Although vitamins A, C & E are antioxidants that play first line defense against free radical damage, they can become free radicals themselves once they give up one of their electrons. These oxidized vitamins have to be regenerated by other antioxidants (other vitamins or antioxidant compounds). Therefore, It is better to consume a combination of antioxidant compounds instead of a high dose of single vitamin.

The most popular antioxidant supplements include vitamins A (beta-carotene), C & E, green tea extract (EGCG), alpha-lipoic acid, N-acetylcysteine (NAC), oligomeric proanthocyanidins (OPC, grape seed extract), curcumin (turmeric), silymarin (milk thistle), superoxide dismutase, zinc and selenium.


Best Selling Antioxidant Supplements:



Common Ailments

Colds & Flu
Eye Problems
Hair Loss
Memory Loss
Menstrual Problems



Liquid Vitamins
Antioxidant Supplements
Enzyme Supplements
Daily Complete Vitamins
Mineral Supplements
EFA Supplements
Probiotics & Antibiotics

Popular brands: Enzymatic Therapy Supplements, Garden of Life Vitamins, New Chapter Vitamins, Natrol Vitamins, Nature's Plus Vitamins, Nature's Way Vitamins, Now Foods Vitamins

Disclaimer: The materials written for our website are intended for informational purposes only. They are not intended to be a substitute for professional medical advice.

Questions or problems regarding this web site? Please contact us        Privacy policy         Sitemap

Copyright 2004-2012 []. All rights reserved.    Discount Vitamin Supplements | Discount Vitamins Online