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

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Synopsis

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

Vitamin C (ascorbic acid) has scientific validation for its role in supporting eye health, particularly in relation to age-related eye conditions. Vitamin C is a potent antioxidant, and the eyes are especially vulnerable to oxidative stress due to their exposure to light and oxygen. Research, including large studies such as the Age-Related Eye Disease Study (AREDS), has shown that antioxidant vitamins—including vitamin C—can slow the progression of age-related macular degeneration (AMD) when used in combination with other nutrients (vitamin E, beta-carotene, zinc, and copper). Additionally, vitamin C is important for maintaining the health of blood vessels in the eye. Observational studies suggest that higher dietary intake of vitamin C may be associated with a reduced risk of cataracts, although randomized controlled trials have produced mixed results regarding its effectiveness for cataract prevention or treatment. Overall, while vitamin C alone is not a cure or definitive preventive agent for major eye diseases, its antioxidant properties and role in combination supplement formulas are backed by moderate scientific evidence supporting its use in maintaining eye health and slowing progression of certain age-related conditions.

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