Synopsis

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

Vitamin B complex, particularly vitamins B2 (riboflavin), B6 (pyridoxine), B9 (folate), and B12 (cobalamin), has scientific backing for supporting eye health. Riboflavin is especially noted for its role in reducing the risk of cataracts; several studies have correlated adequate riboflavin intake with a lower incidence of cataracts, likely due to its antioxidant properties that help protect the eye lens from oxidative damage. Additionally, deficiencies in B12 and folate can lead to elevated homocysteine levels, which have been associated with an increased risk of retinal vascular problems and age-related macular degeneration (AMD). Some clinical trials and observational studies have found that supplementation with a combination of B vitamins may slow the progression of AMD, though results are mixed and not all B vitamins have shown a direct effect on eye disease.

Overall, while B vitamins are not considered a primary treatment for eye conditions, their roles in cellular metabolism, nerve function (important for the optic nerve), and vascular health provide a scientific rationale for their supportive use in maintaining healthy vision and possibly reducing the risk of certain age-related eye diseases. The evidence is moderate but not conclusive, hence a rating of 3.

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