Synopsis

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

Flavonoids, a diverse group of plant polyphenols, have been investigated for their potential role in supporting eye health, particularly in conditions like diabetic retinopathy, age-related macular degeneration (AMD), and cataracts. Scientific studies suggest flavonoids possess antioxidant, anti-inflammatory, and vasoprotective properties, which are relevant because oxidative stress and microvascular dysfunction contribute to many eye diseases. Specific flavonoids—such as quercetin, rutin, and anthocyanins—have shown in preclinical studies to reduce retinal oxidative damage and improve microcirculation in ocular tissues. Some small clinical trials and observational studies suggest that higher dietary intake of flavonoids is associated with a lower risk of developing certain eye conditions, particularly AMD and cataracts. For instance, anthocyanin-rich bilberry extracts have been studied for their potential to improve night vision and reduce eye fatigue, though results are mixed and larger, high-quality clinical studies are lacking. Overall, while there is plausible biological rationale and some supportive human data, the evidence base is not strong or consistent enough for widespread medical endorsement. Thus, the use of flavonoids for eye problems is scientifically justified but remains an area of ongoing research rather than established clinical practice.

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