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Limited evidenceHeart & metabolic

Calamari Oil

Squid-derived oil with a high DHA-to-EPA ratio. No trial has tested calamari oil on its own against placebo; what is known applies to high-DHA oils as a class.

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What the science says

  • Effects of high-DHA oils Limited evidence

    A systematic review of high-DHA fish oils, which explicitly includes calamari oil among the newer sources, found supportive but inconsistent evidence for heart, cardiovascular and brain function, and noted that DHA and EPA have different and sometimes complementary effects. The review does not isolate calamari oil.

  • Calamari oil in a combination product Limited evidence

    A randomised, double-blind, placebo-controlled trial of a hemp oil, calamari oil and broccoli combination reported reductions in pain and oxidative stress markers. Calamari oil was one of three ingredients, so nothing can be concluded about it alone.

  • Sustainability and DHA density Limited evidence

    Calamari oil does provide more DHA per gram than typical fish oil, which is a formulation fact rather than a demonstrated health advantage; no head-to-head trial shows better outcomes than an equivalent dose of DHA from another source.

Dosage & safety

Studied doseNo trial-established dose. Products typically supply 300–500 mg DHA per capsule; judge them on total DHA and EPA rather than on the source.
SafetySimilar to other marine oils: fishy aftertaste, reflux and loose stools, and mildly increased bleeding time at doses above roughly 3 g/day, which matters with anticoagulants and before surgery. Not for people with shellfish or mollusc allergy. Marine oils oxidise readily, and independent testing has found rancidity common across omega-3 supplements, so check freshness and third-party testing.

How to take it

TimingTiming does not matter.
With food?Take it with a fat-containing meal for absorption and fewer fishy burps.
Worth knowingCompare products on price per gram of DHA plus EPA, since the squid source itself buys you nothing over fish oil.

Interactions

With medications

  • warfarin, DOACs, aspirin and clopidogrel

    Marine oils above roughly 3 g/day mildly prolong bleeding time. tell your doctor before using high doses and stop before surgery

With other supplements

  • other marine oils and krill oil

    Easy to double up on total EPA and DHA without noticing. add up EPA plus DHA across all your products

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

Frequently asked questions

Is calamari oil better than fish oil?

Calamari oil provides more DHA per gram than typical fish oil, but no head-to-head trial shows better outcomes than an equal dose of DHA from another source. The evidence for calamari oil is limited, so compare products on price per gram of DHA plus EPA.

Has calamari oil been proven to work?

No trial has tested calamari oil on its own against placebo; the evidence is limited and comes from high-DHA oils as a class, which show supportive but inconsistent results for heart and brain function. The one calamari trial used a three-ingredient combination product.

How much calamari oil should I take?

Calamari oil has no trial-established dose; products typically supply 300–500 mg DHA per capsule. Take calamari oil with a fat-containing meal, and add up EPA plus DHA across all your marine oil products.

Is calamari oil safe with a shellfish allergy?

No, calamari oil is not for people with shellfish or mollusc allergy. Like other marine oils, calamari oil above roughly 3 g/day mildly prolongs bleeding time, which matters with anticoagulants and before surgery.

Scientific references

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