Evidence supporting the use of: Vitamin A (vitamin A acetate)
For the body system: Eyes

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Synopsis

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

Vitamin A (including its form as vitamin A acetate) is scientifically validated to support eye health, primarily due to its critical role in the visual cycle. Vitamin A is an essential component of rhodopsin, a pigment in the retina that is necessary for low-light (scotopic) and color vision. Deficiency in vitamin A can lead to night blindness and, if severe, to xerophthalmia, a condition that can result in irreversible blindness. The World Health Organization recognizes vitamin A supplementation as an effective intervention for preventing blindness in populations at risk of deficiency. Numerous clinical and epidemiological studies have demonstrated that adequate vitamin A intake maintains normal vision and is crucial in protecting the ocular surface tissues. Notably, vitamin A supplementation has been shown to reverse early symptoms of deficiency-related eye problems, such as night blindness. However, for conditions not related to deficiency (such as age-related macular degeneration), the evidence is less robust, and high doses can be toxic. In summary, vitamin A’s role in supporting the eyes is both biologically essential and thoroughly supported by scientific research, particularly regarding the prevention and treatment of deficiency-related ocular disorders.

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