Pal Selenium sustained release 200 mcg (antioxidant) 60 tablets. Characteristics: Selenium is a component of the antioxidant enzyme glutathione peroxidase which is an essential part of our body's defense against free radicals. Along with a number of other minerals and vitamins, selenium is part of the main body's antioxidant defense, protecting cells, cell membranes and fatty acids against free radicals. - It also increases the production of white blood cells, neutralizes the effect of heavy metals, preventing mutations. Who should take selenium supplements? - Persons with unbalanced dietary habits - Senior citizens with low food consumption. - People who are constantly dieting - Smokers. (The snuff wears reserves of selenium in the body).