Supplement evidence

066 / 575Fatty-acid form

Krill oil

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The short answer

Provides EPA and DHA in phospholipid-rich oil; clinical superiority over fish oil is not established.

Evidence and scope: Conditional or population-specific
This status does not grade the ingredient for every goal, outcome, or person.
Important limitation: Benefit depends on the population, formulation, baseline status, and objective; results should not be generalized.
Before deciding: Key concern: Shellfish allergy, anticoagulants, surgery, product oxidation, and atrial-fibrillation risk require review.

01 / PRACTICAL GUIDE

Dose, absorption, and combinations

These are indication-specific reference or studied ranges—not a personalized prescription. Start with the objective, then check the form, label, medicines, and health conditions.

Reference range by objective

Meeting usual needsDose by EPA+DHA content; commonly 250–500 mg/day combined

Reference or studied range—not a personalized prescription. The product label or a clinician may specify a different dose.

Dose source ↗

More is not automatically better. A clinician or product label may specify a different amount.

Absorption / solubilityFat-soluble / lipid-based

Fat-soluble or lipid-based. Absorption generally improves with a meal containing fat.

How it is commonly taken

Take with food.

Do not combine casually

Shellfish allergy, anticoagulants, surgery, product oxidation, and atrial-fibrillation risk require review.

Dose and use source ↗

Dose and use links lead to primary or official source material. Search links are discovery tools, not proof that every returned paper applies.

02 / EVIDENCE

What the research says

We keep supportive, mixed, negative, safety, and contextual findings together. The headline never replaces the underlying papers.

4research papers in this ledger

4unique primary studies represented

863unique participants represented

These are audited counts for this JIVANA collection, not search-result totals. Participants are counted once when multiple papers use the same cohort; review papers are not added again to participant totals.

Open the research timelineResearch timeline

Entries are ordered by publication year. A study period appears only when the source reports it.

2024

Does not support the tested claimPMID 38776073 · ACTRN12616000726459

Krill Oil for Knee Osteoarthritis: A Randomized Clinical Trial

Pain improved substantially in both groups, with virtually no between-group difference (-0.3 points; 95% CI -6.9 to 6.4). Adverse-event rates were similar, and the trial does not support krill oil for knee pain in this population.

Published: 2024Duration: 24 weeksn=262 participants

Study design and methods

Design: Multicenter, randomized, double-blind, placebo-controlled trial
Population: 262 adults with knee osteoarthritis, significant pain, and MRI-confirmed effusion-synovitis
Intervention: Krill oil 2 g/day or matching placebo
Outcome: Knee pain on a 0–100 visual analogue scale and adverse events

Funding or conflict note: The investigator-initiated trial received funding from Aker BioMarine. PubMed lists no product-related author conflict beyond institutional grant support.

Open research record ↗

2022

Mixed or qualifiedPMID 35880828 · NCT03483090

Krill oil improved osteoarthritic knee pain in adults with mild to moderate knee osteoarthritis

Pain, stiffness, and function changes modestly favored krill oil, but the pain difference was only 5.18 points on a 0–100 scale and NSAID use, lipids, and inflammatory markers did not differ. A later larger trial in a more symptomatic population was null.

Published: 2022Duration: 6 monthsn=235 participants

Study design and methods

Design: Multicenter, randomized, double-blind, placebo-controlled trial
Population: 235 adults aged 40–65 with mild to moderate knee osteoarthritis and regular knee pain
Intervention: Krill oil 4 g/day, providing EPA 0.60 g and DHA 0.28 g, or mixed-vegetable-oil placebo
Outcome: WOMAC knee pain, stiffness, physical function, NSAID use, lipids, inflammation, and safety

Open research record ↗

2015

Does not support the tested claimPMID 26328782 · NCT02427373

Similar EPA and DHA plasma levels achieved with fish oil or krill oil in a randomized double-blind bioavailability study

Matched EPA+DHA doses produced no significant differences in plasma or red-cell levels across fish-oil and krill-oil forms. This does not support a reliable long-term bioavailability advantage for krill oil.

Published: 2015Duration: 28 daysn=66 participants

Study design and methods

Design: Randomized, double-blind, three-arm matched-dose trial
Population: 66 healthy adults
Intervention: EPA plus DHA 1.3 g/day as fish-oil ethyl esters, fish-oil triglycerides, or krill oil
Outcome: Plasma and red-cell EPA plus DHA and omega-3 index

Open research record ↗

2014

Mixed or qualifiedPMID 24461313

Krill oil supplementation lowers serum triglycerides without increasing low-density lipoprotein cholesterol

After pooling all four doses, krill oil produced a calculated 10.2% triglyceride reduction versus placebo without raising LDL. Pooling erased the randomized dose groups because of high within-person variability, so the study does not identify an effective dose or prove clinical-event benefit.

Published: 2014Duration: 12 weeksn=300 participants

Study design and methods

Design: Multicenter, randomized, double-blind, placebo-controlled dose-ranging trial
Population: 300 adults with borderline-high or high triglycerides and low habitual fish intake
Intervention: Krill oil 0.5, 1, 2, or 4 g/day or olive-oil placebo
Outcome: Fasting triglycerides and lipoprotein particles

Funding or conflict note: Four of five authors were affiliated with Aker BioMarine, the krill-oil manufacturer, or its contract research organization.

Open research record ↗

Unscreened discovery appendix—not evidence62 candidate publicationsSearch run: Aug 21, 2026

Complete for the displayed PubMed query at the search timestamp—not for all databases or every possible synonym. Candidates can be irrelevant, duplicate the same study, or report negative findings. They are never summed as evidence or participants until screened.

03 / SOURCES

Start with the source material

Official evidence overviewPubMed bounded human-evidence search Live PubMed discovery searchNational Library of Medicine

The live search is for discovery only. Search-result counts change and are not included in the audited totals above.

Recent PubMed discovery recordsDirect links to the first 12 records returned by the reproducible search. These are discovery candidates—not reviewed summaries or a count of supportive findings.

04 / EXPERT CONTEXT

Expert context—not evidence

Expert positions are dated context—not scientific evidence. They never raise the evidence status or become consensus by repetition.

No direct, source-verified endorsement is currently recorded. Research authorship or discussion alone is not treated as endorsement.