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

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Synopsis

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

Antioxidants, in general, are supported by scientific evidence for their role in supporting eye health, particularly in the prevention of age-related eye conditions such as age-related macular degeneration (AMD) and cataracts. Large clinical studies, most notably the Age-Related Eye Disease Study (AREDS) and AREDS2 conducted by the National Eye Institute, demonstrated that specific antioxidant nutrients—including vitamin C, vitamin E, beta-carotene, and zinc—can slow the progression of AMD in people at high risk. These antioxidants are thought to help by neutralizing free radicals, which can cause oxidative damage to cells in the eyes. While these findings do not apply to all antioxidants universally, and the term "antioxidant (unspecified)" is broad, there is a general scientific consensus that certain antioxidants are beneficial for eye health. However, the evidence is strongest for specific combinations and doses of antioxidants rather than for all antioxidant compounds in general. The use of antioxidants for general eye health beyond these specific conditions is less well-established, and not all antioxidants have been shown to be effective. Therefore, the evidence rating is moderate (3), reflecting strong support for certain antioxidants but not for the entire category or for prevention in the general population.

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