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Moderate evidenceHeart & metabolic

Krill Oil

Krill oil delivers EPA and DHA in phospholipid form and modestly lowers triglycerides, much like fish oil, at a much higher price per gram of omega-3. The most consistent distinct signal is a small-to-moderate reduction in knee osteoarthritis pain.

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What the science says

  • Lowers triglycerides and modestly improves lipids Moderate evidence

    Meta-analyses of krill oil RCTs report reductions in triglycerides in the range of roughly 10-20 mg/dL versus placebo, with small LDL and HDL changes. The effect is consistent with what an equivalent dose of EPA+DHA from fish oil would do, so the lipid benefit is an omega-3 effect rather than something unique to krill.

  • Reduces knee osteoarthritis pain Moderate evidence

    A 2024 systematic review with trial sequential analysis found krill oil reduced knee pain versus placebo across randomized trials, though the pooled effect was small and the evidence base is dominated by industry-funded studies. The largest single trial (n=235, 4 g/day for 6 months) found a statistically significant but clinically modest improvement in WOMAC knee pain of about 4 points on a 0-100 scale.

  • Superior absorption compared with fish oil Limited evidence

    Marketing claims that phospholipid-bound omega-3s are far better absorbed are not supported by head-to-head data. A 4-week double-blind bioavailability trial found similar plasma EPA and DHA levels from krill oil and fish oil when the omega-3 dose was matched, meaning any advantage is at best marginal.

Dosage & safety

Studied dose1-4 g/day of krill oil, providing roughly 120-600 mg combined EPA+DHA. Osteoarthritis trials used 4 g/day (about 0.6 g EPA+DHA) for 6 months; lipid trials used 1-3 g/day for 4-12 weeks. Check the label for actual EPA+DHA content, not just total oil.
SafetyGenerally well tolerated; fishy aftertaste, burping, and mild GI upset are the common complaints. Contraindicated in people with shellfish or crustacean allergy, since krill are crustaceans. Like other omega-3s it has a mild antiplatelet effect, so use caution with warfarin, DOACs, or antiplatelet drugs and disclose it before surgery. Not appropriate as a substitute for prescription omega-3 therapy in severe hypertriglyceridemia because doses are far too low.

How to take it

TimingTiming does not matter.
With food?With a meal containing fat, which improves absorption and reduces the fishy repeat.
Worth knowingRead the EPA+DHA line, not the total oil: 1 g of krill oil delivers roughly a fifth of what 1 g of concentrated fish oil does.

Interactions

With medications

  • warfarin, DOACs and antiplatelet drugs

    Omega-3s have a mild antiplatelet effect that adds to anticoagulation. tell your prescriber and disclose it before surgery

With other supplements

  • fish oil, cod liver oil and algae omega-3

    Redundant — you are paying twice for the same EPA and DHA, and the antiplatelet effects add. pick one omega-3 source and count the total EPA+DHA

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

Frequently asked questions

Is krill oil better than fish oil?

Not meaningfully: a matched-dose trial found similar blood EPA and DHA levels from krill oil and fish oil, so the superior-absorption claim has limited support. Krill oil lowers triglycerides about as much as the equivalent omega-3 from fish oil, at a much higher price per gram of omega-3.

Does krill oil help knee osteoarthritis pain?

There is moderate evidence that krill oil modestly reduces knee osteoarthritis pain; the largest trial used 4 g/day for 6 months and found about a 4-point improvement on a 0-100 pain scale. The pooled effect is small and most studies were industry-funded.

How much krill oil should I take per day?

Typical krill oil doses are 1-4 g/day, providing roughly 120-600 mg combined EPA+DHA, taken with a meal containing fat. Check the label for actual EPA+DHA content, not just total oil.

Who should not take krill oil?

Do not take krill oil if you have a shellfish or crustacean allergy, since krill are crustaceans. Its mild antiplatelet effect means you should tell your prescriber if you take anticoagulants and disclose it before surgery.

Scientific references

Where to buy

California Gold Nutrition, Premium Krill Oil with SUPERBABoost®, 1,000 mg, 60 Fish Gelatin Softgels

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