Evidence supporting the use of: Vitamin A (retinyl acetate)
For the health condition: Eyesight (poor)

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Synopsis

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

Vitamin A, particularly in the form of retinyl acetate, has strong scientific validation for its role in supporting eyesight and treating poor vision, especially night blindness. Vitamin A is an essential nutrient required for the synthesis of rhodopsin, a photopigment found in the retina that is critical for vision in low-light conditions. Deficiency of vitamin A is a well-established cause of night blindness and, in severe cases, can lead to xerophthalmia and irreversible blindness. Numerous clinical and epidemiological studies have demonstrated that supplementation with vitamin A can prevent and treat these eye conditions, particularly in populations at risk of deficiency. The World Health Organization recognizes vitamin A supplementation as an effective intervention to prevent blindness in children in developing countries. There is a wealth of randomized controlled trials and observational data supporting the use of vitamin A for maintaining normal vision and preventing deficiency-related eye disease. However, for other causes of poor eyesight not related to deficiency (such as refractive errors), vitamin A is not effective. In summary, there is robust scientific evidence for the use of vitamin A (retinyl acetate) in preventing and treating poor eyesight caused by vitamin A deficiency, especially night blindness.

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