Evidence supporting the use of: Krill
For the body system: Eyes

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Table of Contents

Synopsis

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

Krill oil is used to support eye health primarily due to its high content of omega-3 fatty acids, particularly eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Omega-3s, and especially DHA, are integral components of the retina and have been shown to play a role in maintaining normal visual function. Several clinical studies have demonstrated that omega-3 supplementation can help manage symptoms of dry eye syndrome and may reduce the risk of age-related macular degeneration (AMD), although the evidence is stronger for fish oil than specifically for krill oil. Krill oil is distinguished from fish oil by the presence of phospholipids, which may enhance the bioavailability of omega-3s, and by the antioxidant astaxanthin, which is hypothesized to provide additional protective effects against oxidative damage in ocular tissues. However, direct clinical evidence supporting krill oil itself for eye health is limited; most research extrapolates from general omega-3 studies. Meta-analyses and systematic reviews suggest moderate benefit of omega-3s for dry eye symptoms and possible protection against AMD progression, but do not single out krill oil as superior. Thus, while there is a plausible scientific rationale and some supporting evidence for the use of krill oil for eye health, the strength of the evidence is moderate and mostly indirect.

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