Antioxidants are one of the many protective compounds found in plants, known as phytochemicals. The main function of antioxidants is to neutralize free radicals in the body, thought to be the cause of premature aging and heart disease. Antioxidants are essential for proper function of the immune system. This is partly because immune cells produce free radicals for normal defense functions. If the level of free radicals in the immune cells surpasses beyond the normal level, they negatively affect the immune system. On the other hand, antioxidants act as scavengers of the free radicals in cells and therefore promote our immunity. Imbalance between free radical and antioxidants in cells, due to deficiency in single or multiple antioxidants has been reported to result in weakness of immunity function.

Antioxidants boost immunity system also by playing other important roles such as in cellular metabolism, signal transduction, gene activation, and transcription. High-density lip-protein (HDL) cholesterol has inhibitory effect against oxidation of low-density lip-protein, which is implicated with development of atherosclerosis and cardiovascular diseases. High-density lip-protein (HDL) also prevents endothelial cell dysfunction and activation, maintain the integrity of the endothelial cell lining, and reduce the deleterious effect of oxidized low-density lip-protein (LDL) cholesterol and the levels of thrombogenic factors.

The most important antioxidants include: carotenoids such as beta carotene, vitamin C, vitamin E, tocotrienol, NAC (n-acetyl-l-cysteine), glutathione, L-cysteine and components found in certain herbs such as, ginkgo biloba, bilberry, red wine (grape skins) and green tea. The minerals, zinc and selenium, are crucial components of important antioxidant enzyme systems in the body. Solgar supplies several different antioxidants supplement products such as Solgar Alpha Lipoic Acid 60 Mg Vegicaps 30 Capsules And Solgar Alpha Lipoic Acid 120 Mg Vegicaps 60 Capsules.