Krill Oil
Omega/Fatty Acid ·Exploratory record · not publication-reviewed ·Updated July 13, 2026
EPA/DHA bound to phospholipids for superior bioavailability. Also contains astaxanthin, a powerful antioxidant. Often better tolerated than fish oil with no fishy burps.
Exploratory record, not a reviewed medical publication.
See the editorial and medical-review policies for the publication gate.
This generated database record has not completed a claim-level review by a qualified human medical reviewer. Bibliography links and evidence labels are not approval. The page remains available for reference and is excluded from search indexing.
What the research says.
A quick, data-only summary. The full evidence, dosing, and sources are below.
Krill Oil is an omega/fatty acid most often used for heart health, brain function, joint comfort. NutriStack rates the overall evidence as moderate. A typical adult dose is 500–1,000 mg krill oil daily, commonly taken as antarctic krill oil (phospholipid-bound epa/dha + astaxanthin). This profile indexes 16 sources.
The bottom line
Evidence rating moderate. Most-documented uses: heart health, brain function, joint comfort. 16 sources indexed (2003–2026), with 0 interaction records on file.
How it works, mechanistically.
Core mechanism
Phospholipid-bound omega-3s integrate directly into cell membranes more efficiently than triglyceride-bound forms. Astaxanthin provides additional antioxidant protection, preventing omega-3 oxidation and scavenging singlet oxygen species.12,7
Dosing & protocol.
Better absorbed than fish oil; phospholipid form doesn't require as much dietary fat1,2
What it actually costs.
Real-world pricing across three quality tiers. Assumes Phospholipid (Krill Oil).
Assumes a daily dose delivering roughly 500-1,000 mg krill oil. Krill is usually more expensive per gram of EPA plus DHA than standard fish oil. Updated 2026-04-02.
The same dose, as food.
How much you'd eat to match a supplemental dose.
Krill oil is mainly a supplement delivery format.
Full safety detail.
Side effects
- Generally better tolerated than fish oil
- Rare GI upset
Contraindications
- Shellfish allergy
- Blood thinners
Sources, by evidence tier.
Numbered references. Citations throughout the page link here.
Meta-analyses & systematic reviews
5- 1Clinical efficacy and mechanisms of krill oil supplementation in knee osteoarthritis: meta-analysis and mechanistic insightsPMIDKou H, Liu H, Lai L et al. · Inflammopharmacology · 2026
Kou H, Liu H, Lai L et al.. Clinical efficacy and mechanisms of krill oil supplementation in knee osteoarthritis: meta-analysis and mechanistic insights. Inflammopharmacology. 2026
- 2Clinical effectiveness of krill oil supplementation on cardiovascular health in humans: An updated systematic review and meta-analysis of randomized controlled trialsPMIDXie D et al. · Nutr Metab Cardiovasc Dis · 2024
Krill oil supplementation significantly reduced plasma LDL cholesterol and triglycerides across 7 RCTs with 662 participants.
- 3Krill oil supplementation for knee pain: a systematic review and meta-analysis with trial sequential analysis of randomized controlled trialsPMIDPimentel T, Queiroz I, Florêncio de Mesquita C et al. · Inflammopharmacology · 2024
Pimentel T, Queiroz I, Florêncio de Mesquita C et al.. Krill oil supplementation for knee pain: a systematic review and meta-analysis with trial sequential analysis of randomized controlled trials. Inflammopharmacology. 2024
- 4Lipid-modifying effects of krill oil vs fish oil: a network meta-analysisPMIDUrsoniu S et al. · Medicine (Baltimore) · 2017
Network meta-analysis concluded that the lipid-modifying effects of krill oil and fish oil do not significantly differ.
- 5Lipid-modifying effects of krill oil in humans: systematic review and meta-analysis of randomized controlled trialsPMIDUrsoniu S, Sahebkar A, Serban MC et al. · Nutrition reviews · 2017
Ursoniu S, Sahebkar A, Serban MC et al.. Lipid-modifying effects of krill oil in humans: systematic review and meta-analysis of randomized controlled trials. Nutrition reviews. 2017
Randomized controlled trials
8- 6Pilot Randomized Controlled Trial of Krill Oil Supplementation for Chronic Musculoskeletal Pain in Older AdultsPMIDTamargo JA, Carvajal E, Simic K et al. · The Journal of nutrition · 2026
Tamargo JA, Carvajal E, Simic K et al.. Pilot Randomized Controlled Trial of Krill Oil Supplementation for Chronic Musculoskeletal Pain in Older Adults. The Journal of nutrition. 2026
- 7Krill oil increase plasma omega-3 fatty acids more than fish oil in healthy adults: a double blind randomized controlled trialPMIDLoukil I, Vachon A, Çaku A et al. · The American journal of clinical nutrition · 2026
Loukil I, Vachon A, Çaku A et al.. Krill oil increase plasma omega-3 fatty acids more than fish oil in healthy adults: a double blind randomized controlled trial. The American journal of clinical nutrition. 2026
- 8Krill Oil for Knee Osteoarthritis: A Randomized Clinical TrialPMIDLaslett LL, Scheepers LEJM, Antony B et al. · JAMA · 2024
Multicenter RCT of 262 participants found 2 g/day krill oil for 24 weeks did not improve knee pain compared to placebo in patients with knee osteoarthritis and effusion-synovitis.
- 9Correction: Hill et al. A Multicenter, Randomized, Double-Blinded, Placebo-Controlled Clinical Trial to Evaluate the Efficacy and Safety of a Krill Oil, Astaxanthin, and Oral Hyaluronic Acid Complex on Joint Health in People with Mild Osteoarthritis. Nutrients 2023, 15, 3769PMIDHill WS, Dohnalek MH, Ha Y et al. · Nutrients · 2024
Hill WS, Dohnalek MH, Ha Y et al.. Correction: Hill et al. A Multicenter, Randomized, Double-Blinded, Placebo-Controlled Clinical Trial to Evaluate the Efficacy and Safety of a Krill Oil, Astaxanthin, and Oral Hyaluronic Acid Complex on Joint Health in People with Mild Osteoarthritis. Nutrients 2023, 15, 3769. Nutrients. 2024
- 10Effectiveness of a Novel omega-3 Krill Oil Agent in Patients With Severe Hypertriglyceridemia: A Randomized Clinical TrialPMIDMozaffarian D, Maki KC, Bays HE et al. · JAMA Netw Open · 2022
Phase 3 RCT of 520 patients with severe hypertriglyceridemia found krill oil-derived omega-3 reduced TG levels by 26.0% vs 15.1% for placebo at 12 weeks (treatment difference -10.9%, p=0.02). Safe and well-tolerated.
- 11Bioavailability of fatty acids from krill oil, krill meal and fish oil in healthy subjects--a randomized, single-dose, cross-over trialPMIDRamprasath VR et al. · Lipids Health Dis · 2015
EPA and DHA in krill oil showed higher 72-hour bioavailability in plasma phospholipids compared to krill meal or fish oil.
- 12Incorporation of EPA and DHA into plasma phospholipids in response to different omega-3 fatty acid formulations--a comparative bioavailability study of fish oil vs. krill oilPMIDSchuchardt JP et al. · Lipids Health Dis · 2011
Krill oil had higher incorporation of EPA+DHA into plasma phospholipids compared to fish oil rTAG and ethyl-ester forms.
- 13Evaluation of the effects of Neptune Krill Oil on the management of premenstrual syndrome and dysmenorrheaPMIDSampalis F et al. · Altern Med Rev · 2003
Neptune Krill Oil significantly reduced dysmenorrhea and emotional PMS symptoms and was more effective than omega-3 fish oil for complete PMS management.
Reviews & position papers
1- 14Comparison of bioavailability of krill oil versus fish oil and health effectSource linkedPMIDUlven SM, Holven KB · Vasc Health Risk Manag · 2015
Reference material
2- 15Meng J, Wang X, Li Y et al.. Krill oil for knee osteoarthritis: A meta-analysis of randomized controlled trials. Medicine. 2025Source linkedPMID
- 16Hill WS, Dohnalek MH, Ha Y et al.. A Multicenter, Randomized, Double-Blinded, Placebo-Controlled Clinical Trial to Evaluate the Efficacy and Safety of a Krill Oil, Astaxanthin, and Oral Hyaluronic Acid Complex on Joint Health in People with Mild Osteoarthritis. Nutrients. 2023Source linkedPMID
Common questions.
Quick answers about Krill Oil, drawn from the data on this page.
What is Krill Oil?
EPA/DHA bound to phospholipids for superior bioavailability. Also contains astaxanthin, a powerful antioxidant. Often better tolerated than fish oil with no fishy burps.
What is Krill Oil used for?
Commonly cited benefits of Krill Oil include: Heart health; Brain function; Joint comfort; PMS relief; Antioxidant protection. NutriStack rates the overall evidence as moderate.
What is a typical dose of Krill Oil?
A typical adult dose of Krill Oil is 500–1,000 mg krill oil daily. The commonly recommended form is Antarctic krill oil (phospholipid-bound EPA/DHA + astaxanthin). These are general ranges, not personalized advice; confirm the right dose with a clinician.
What are the side effects of Krill Oil?
Reported side effects include generally better tolerated than fish oil, rare gi upset. This is educational information; check with a healthcare professional before use.
How strong is the evidence for Krill Oil?
NutriStack rates this as Moderate, meaning several aligned RCTs or one large RCT plus supporting reviews. Full tier criteria are at https://nutristackapp.com/methodology/evidence-tiers.
Use this with your stack
Krill Oil in NutriStack.
Add it to your stack, see how it interacts with everything else you take, and get a Stack Score that updates the moment it does.