Cataracts
Supplements studied for cataracts.
Overview
Dietary and supplemental antioxidants dominate cataract prevention research here. Lutein intake or higher blood levels appear linked to lower cataract risk, especially nuclear cataracts, in observational research; supplements with lutein and zeaxanthin may reduce surgery need in low-intake groups over several years.
Vitamin C from food or supplements is similarly associated with lower cataract risk in population studies. By contrast, B-vitamin combinations including Vitamin B12, Vitamin B6, and Vitamin B9 (Folate) did not prevent cataracts in long-term trials of women at cardiovascular risk and may have been linked to higher cataract surgery rates. See the heatmap and evidence reviews below for trial-level detail.
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