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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.

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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.

How to take it

TimingSplit across two meals rather than one large dose - 2-3 g of oil at once is what causes reflux for most people.
With food?With the fattiest meals of the day; omega-3 absorption roughly doubles with a fat-containing meal compared with an empty stomach.
Worth knowingKeep the capsules in the freezer - it largely stops the fishy repeats, and if a capsule smells rancid when you cut it, the batch is oxidised and worth returning.

Interactions

With medications

  • warfarin, direct oral anticoagulants, aspirin and other antiplatelets

    High-dose EPA and DHA mildly prolong bleeding time, which adds to the drug's effect. tell your prescriber before starting at these doses and stop two weeks before surgery

  • orlistat

    It blocks absorption of dietary and supplemental fat, including omega-3 oils. separate by at least 2 hours

With other supplements

  • ginkgo, garlic and high-dose vitamin E

    Additive effect on platelet function. be aware of the total if you stack several, especially before a procedure

Well-established interactions only — this is not a complete list. Always tell your doctor and pharmacist what you take.

Frequently asked questions

Does omega-3 help dry eyes?

The evidence for omega-3 dry eye supplements is moderate and mixed: pooled small trials show modest improvements in symptoms and tear film, but the largest trial, DREAM, found 3 g/day of omega-3 no better than an olive oil placebo over 12 months.

How much omega-3 should I take for dry eyes?

Dry eye trials used roughly 1,000-2,000 mg/day of combined EPA and DHA, split across meals containing fat. Benefits, when they appear, take 3-6 months.

Are dry eye supplements safe with blood thinners?

High-dose EPA and DHA in dry eye supplements mildly prolong bleeding time, so tell your prescriber if you take anticoagulants or antiplatelets and stop two weeks before surgery. Fishy aftertaste, reflux and loose stools are the common side effects.

Scientific references

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