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Retinol, also called vitamin A 1, is a fat-soluble vitamin in the vitamin A family that is found in food and used as a dietary supplement. [3] Retinol or other forms of vitamin A are needed for vision, cellular development, maintenance of skin and mucous membranes , immune function and reproductive development. [ 3 ]
Vitamin A status involves eye health via two separate functions. Retinal is an essential factor in rod cells and cone cells in the retina responding to light exposure by sending nerve signals to the brain. An early sign of vitamin A deficiency is night blindness. [6] Vitamin A in the form of retinoic acid is essential to normal epithelial cell ...
The predominant cause of nutritional optic neuropathy is thought to be deficiency of B-complex vitamins, particularly thiamine [2] (vitamin B 1), cyanocobalamin (vitamin B 12) and recently copper. [3] Deficiency of pyridoxine (vitamin B 6), niacin (vitamin B 3), riboflavin (vitamin B 2), and/or folic acid also seems to play a role. Those ...
Vitamin A has many functions in the body, including supporting immunity. As a provitamin A carotenoid, beta-carotene helps protect and strengthen the functions of the immune system. It helps the ...
People take vitamins for all kinds of reasons—from vitamins for stress to vitamin B12 supplements —but many add them to their routine with the hope of boosting longevity. However, new research ...
The Age-Related Eye Disease Study ( AREDS) was a clinical trial sponsored by the National Eye Institute that ran from 1992 to 2001. [ 1] The study was designed to: investigate the natural history and risk factors of age-related macular degeneration (AMD) and cataracts, and. evaluate the effects of high doses of antioxidants and zinc on the ...
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