Evidence supporting the use of: Vitamin (unspecified)
For the body system: Eyes

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Synopsis

Source of validity: Scientific
Rating (out of 5): 4

Vitamins play a significant role in supporting eye health, and there is substantial scientific evidence for the benefits of specific vitamins. For example, vitamin A is essential for normal vision, particularly in the formation of rhodopsin, a protein in the retina that is critical for low-light and color vision. Deficiency in vitamin A can lead to night blindness and, in severe cases, xerophthalmia and permanent blindness. Clinical research and public health interventions have shown that vitamin A supplementation reduces the risk of blindness in populations where deficiency is common.

Other vitamins, such as vitamin C and vitamin E, have antioxidant properties and are studied for their potential to reduce the risk or progression of age-related macular degeneration (AMD) and cataracts. The Age-Related Eye Disease Study (AREDS and AREDS2) conducted by the National Eye Institute found that supplementation with a combination of vitamins C and E, beta-carotene (a precursor of vitamin A), zinc, and copper can help slow the progression of intermediate to advanced AMD.

While the evidence is strongest for vitamin A in preventing deficiency-related vision problems, there is moderate scientific support for the role of other vitamins in maintaining eye health and reducing the risk of chronic eye diseases. The use of vitamins for eye health is thus based on a combination of biochemical necessity and large-scale clinical research.

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