Moderate evidenceEye health

Dry Eye Supplements

Omega-3 based blends aimed at the tear film. Pooled trials show small improvements in symptoms and tear break-up time, but the largest and best-controlled trial found no advantage over placebo.

Evidence last reviewed: August 2026

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What the science says

Symptom scores and tear film measures Moderate evidence
Several systematic reviews and meta-analyses of randomized trials report that omega-3 supplementation improves dry eye symptom scores, tear break-up time and Schirmer test results compared with control. The included trials are mostly small and heterogeneous in dose and formulation.
The largest trial was negative Moderate evidence
The DREAM trial randomized 535 patients with moderate-to-severe dry eye to 3 g/day of omega-3 or an olive oil placebo for 12 months and found no significant difference in symptom scores or signs. A Cochrane review rated the overall certainty as low to moderate and the effect as uncertain.
Mucin and other added ingredients Limited evidence
Commercial blends often add lactoferrin, vitamin A, zinc or mucin precursors. These specific combinations have not been tested head-to-head against omega-3 alone in published randomized trials.

Dosage & safety

Studied doseTrials used roughly 1,000–2,000 mg/day of combined EPA + DHA (DREAM used 2,000 mg EPA + 1,000 mg DHA). Benefits, when present, take 3–6 months to appear.

SafetyGenerally well tolerated; fishy aftertaste, reflux and loose stools are common. High doses may mildly prolong bleeding time — discuss with a doctor if you take anticoagulants or antiplatelets. Not a substitute for artificial tears or treatment of the underlying cause.

Scientific references

Omega-3 and omega-6 polyunsaturated fatty acids for dry eye disease
Downie LE, Ng SM, Lindsley KB — Cochrane Database Syst Rev, 2019
n-3 Fatty Acid Supplementation for the Treatment of Dry Eye Disease
Dry Eye Assessment and Management Study Research Group, Asbell PA, Maguire MG — N Engl J Med, 2018
Efficacy of Omega-3 Intake in Managing Dry Eye Disease: A Systematic Review and Meta-Analysis of Randomized Controlled Trials
Wang WX, Ko ML — J Clin Med, 2023

Where to buy

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