Antioxidants Journals
Antioxidants are man-made or natural substances which will prevent or delay some sorts of cell damage. Diets high in vegetables and fruits, which are good sources of antioxidants, are found to be healthy; however, research has not shown
antioxidant supplements to be beneficial in preventing diseases. Examples of
antioxidants include vitamins C and E, selenium, and carotenoids, like beta-carotene, lycopene, lutein, and zeaxanthin. This fact sheet provides basic
information about antioxidants, summarizes what the science says about
antioxidants and health, and suggests sources for extra information. Free radicals are highly unstable
molecules that are naturally formed once you exercise and when your body converts food into energy. Your body also can be exposed to
free radicals from a spread of
environmental sources, like cigarette smoke,
pollution , and sunlight. Free radicals can cause “oxidative stress,” a process which will trigger cell damage. Oxidative
stress is thought to play a role in a variety of diseases including cancer,
cardiovascular diseases, diabetes, Alzheimer’s disease, Parkinson’s disease, and eye diseases such as cataracts and age-related macular degeneration.
Antioxidant molecules are shown to counteract
oxidative stress in laboratory experiments (for example, in
cells or animal studies). However, there's debate on whether consuming large amounts of
antioxidants in supplement form actually benefits health. There is also some concern that consuming
antioxidant supplements in excessive doses could also be harmful.Vegetables and fruits are healthy foods and rich sources of antioxidants.
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