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

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Synopsis

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

Vitamin A is scientifically validated as essential for eye health. Its most critical role is in the formation of rhodopsin, a photopigment in the retina required for low-light (scotopic) vision. Deficiency in vitamin A is a well-established cause of night blindness and, in severe cases, can lead to xerophthalmia, a spectrum of ocular diseases ranging from dryness of the conjunctiva and cornea to complete blindness. Numerous large-scale studies, particularly in populations with dietary deficiencies, have documented that vitamin A supplementation significantly reduces the incidence of blindness and other eye-related complications. The World Health Organization recognizes vitamin A deficiency as a leading cause of preventable childhood blindness globally. Additionally, vitamin A contributes to the maintenance of conjunctival membranes and corneal epithelial integrity. Randomized controlled trials and epidemiological data consistently support the role of vitamin A in supporting and maintaining normal vision and overall eye health. Therefore, the use of vitamin A to support the eyes is robustly supported by scientific evidence.

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