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

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Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Blueberries (Vaccinium spp.) are commonly promoted for eye health, largely due to their high content of anthocyanins and other antioxidant compounds. Scientific studies have investigated the effects of blueberries and their extracts on various aspects of eye health, including visual function and protection against oxidative stress in ocular tissues. Animal and in vitro studies suggest that anthocyanins may help protect retinal cells from oxidative damage, which is implicated in conditions such as age-related macular degeneration and cataracts. Some small human studies have shown improvements in night vision and eye fatigue with blueberry or bilberry supplementation, though results are inconsistent and often limited by small sample sizes and methodological issues. Large-scale, well-controlled clinical trials in humans are lacking, so while the biological plausibility is supported by preclinical research, robust evidence in humans is limited. Thus, while there is some scientific rationale and preliminary evidence for the use of blueberries to support eye health, the strength of evidence is modest, and more rigorous studies are needed to confirm efficacy.

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