Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Carotene, particularly beta-carotene, is a precursor to vitamin A and has been scientifically studied for its role in supporting eye health. Vitamin A is essential for the formation of rhodopsin, a pigment in the retina that enables vision in low-light conditions. A deficiency in vitamin A can lead to night blindness and, in severe cases, complete blindness. Beta-carotene, found in carrots and other orange vegetables, is converted by the body into vitamin A as needed. Several clinical studies, such as those forming the basis for the Age-Related Eye Disease Study (AREDS), have shown that supplementation with beta-carotene (along with other antioxidants) can reduce the risk of progression in age-related macular degeneration (AMD), a major cause of poor eyesight in older adults. However, evidence is stronger for preventing deficiency-related vision problems rather than improving vision in individuals with normal vitamin A status. High-dose beta-carotene supplementation is not recommended for smokers due to an increased risk of lung cancer. In summary, while carotene has a scientifically validated role in preventing vitamin A deficiency and associated vision problems, its effectiveness in treating general "poor eyesight" not caused by deficiency is limited.

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