Evidence supporting the use of: Vitamin A
For the body system: Eyes

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Synopsis

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

Vitamin A is extensively validated by scientific research for its vital role in supporting eye health. It is an essential nutrient for the maintenance of normal vision. The active form of vitamin A, retinal, combines with the protein opsin to form rhodopsin, a molecule necessary for color vision and seeing in low-light conditions. Deficiency in vitamin A is a well-established cause of night blindness and, in severe cases, can lead to xerophthalmia, corneal ulcers, and permanent blindness. Numerous clinical and epidemiological studies have demonstrated that vitamin A supplementation prevents and treats these eye conditions, particularly in populations at risk for deficiency. The World Health Organization identifies vitamin A deficiency as a leading cause of preventable childhood blindness worldwide and recommends supplementation in settings where deficiency is prevalent. While vitamin A is critical for ocular health, excessive intake can be toxic, so supplementation should be guided by medical advice. In summary, the use of vitamin A for supporting the eyes is strongly supported by scientific evidence, with a clear understanding of its mechanisms and clinical benefits in vision and ocular tissue maintenance.

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