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Krill Oil
Clinical dose: 1,000-3,000mg of krill oil daily, yielding 150-450mg combined EPA and DHA
At a Glance
Krill oil delivers omega-3 fatty acids (EPA and DHA) bound to phospholipids rather than triglycerides (as in standard fish oil), which may improve their bioavailability and cellular uptake. Krill oil also naturally contains astaxanthin, a potent antioxidant that helps protect the oil from oxidation. For lipid profile improvement, a pooled analysis of approximately 300 subjects across several studies (PMID: 24689440, PMID: 26328782) found that krill oil supplementation can reduce triglycerides and potentially increase HDL cholesterol. Our top pick is Krill Oil Supplement with EPA & DHA - 1000mg (Grade: B+, $0.57/day).
Quick Picks
What Is Krill Oil?
Krill oil delivers omega-3 fatty acids (EPA and DHA) bound to phospholipids rather than triglycerides (as in standard fish oil), which may improve their bioavailability and cellular uptake. Krill oil also naturally contains astaxanthin, a potent antioxidant that helps protect the oil from oxidation. For lipid profile improvement, a pooled analysis of approximately 300 subjects across several studies (PMID: 24689440, PMID: 26328782) found that krill oil supplementation can reduce triglycerides and potentially increase HDL cholesterol. Some studies suggest krill oil achieves similar lipid improvements at slightly lower total omega-3 doses compared to fish oil, likely due to the phospholipid-bound form improving absorption. However, the absolute EPA and DHA content per serving is substantially lower than concentrated fish oil products, which remains a practical limitation. For joint health, a study of 90 participants with osteoarthritis (PMID: 17353582) found that 300mg of krill oil daily significantly reduced WOMAC pain scores and C-reactive protein (CRP) levels compared to placebo. This anti-inflammatory effect has been replicated in other studies examining systemic inflammation markers. For inflammation reduction, studies involving approximately 120 subjects have consistently shown reductions in C-reactive protein in individuals with mild to moderate inflammatory conditions. The combination of omega-3s and astaxanthin may provide additive anti-inflammatory benefits. The overall evidence is moderate - krill oil has genuine benefits, but much of the foundational omega-3 research was conducted with fish oil, and krill oil-specific studies tend to be smaller. The main practical advantage of krill oil over fish oil is reduced fishy aftertaste and potentially better absorption per milligram of omega-3.
Does It Work? The Evidence
| Claimed Benefit | Evidence Level | Key Studies | Our Verdict |
|---|---|---|---|
| Improves lipid profiles (lowers triglycerides, potentially increases HDL) | Moderate | Pooled analysis of ~300 subjects (PMID: 24689440, 26328782): krill oil achieves similar lipid improvements at slightly lower doses vs fish oil due to phospholipid bioavailability | Promising |
| Reduces joint pain and stiffness in osteoarthritis | Moderate | RCT (n=90, PMID: 17353582): 300mg krill oil significantly reduced WOMAC pain scores and CRP levels vs placebo | Promising |
| Reduces systemic inflammation (CRP) | Moderate | Multiple studies (~120 subjects): consistent reductions in C-reactive protein in mild to moderate inflammatory conditions | Promising |
How to Choose: Forms, Doses & What Matters
Clinical dose: 1,000-3,000mg of krill oil daily, yielding 150-450mg combined EPA and DHA
Best forms: Phospholipid-bound omega-3s (standard in krill oil)
Take with meals to enhance absorption and minimize any potential gastrointestinal discomfort. Can be taken in a single dose or split between morning and evening. Most clinical studies used 1,000-3,000mg of total krill oil daily. The phospholipid-bound form means you may not need as high an EPA/DHA dose as you would with standard fish oil to achieve similar blood levels.
The Scorecard: 10 Products Compared
Neptune Krill Oil 500 mg
NOW FoodsOutstanding value for a properly disclosed krill oil from a reputable brand with good astaxanthin content
Uses NKO (Neptune Krill Oil) with proper EPA/DHA disclosure at clinical dose
GMP certified with strong internal testing practices, Friend of the Sea certified
$0.35/day at 1000mg dose (2 softgels) - excellent value for krill oil
Full disclosure of EPA, DHA, phospholipids, and astaxanthin content
Prices checked 2026-03-31. Cost shown is per clinically effective daily dose, not per pill.
Krill Oil Supplement with EPA & DHA - 1000mg
Sports ResearchIKOS certified Superba 2 krill oil with excellent label transparency and sustainable sourcing
Uses clinically validated Superba 2 krill oil with proper EPA/DHA disclosure
IKOS certified for purity and freshness, MSC certified sustainable
$0.57/day - reasonable pricing for a quality-certified product
Full disclosure of EPA, DHA, phospholipids, and astaxanthin content
Prices checked 2026-03-31. Cost shown is per clinically effective daily dose, not per pill.
Krill Oil 500 mg
Jarrow FormulasUses K-Real multi-stage extraction krill oil, reliable mid-range option with solid transparency
Uses multi-stage extraction K-Real krill oil with proper omega-3 disclosure
GMP certified but no independent third-party purity certification
$0.52/day at 1000mg dose (2 softgels) - solid mid-range value
Full disclosure of EPA, DHA, phospholipids, and astaxanthin content
Prices checked 2026-03-31. Cost shown is per clinically effective daily dose, not per pill.
Pure Antarctic Krill Oil Multi-Benefit Omega-3 1200mg Softgels
Kori
Strong sustainability practices with MSC certification, but slightly lower EPA/DHA yield per gram vs premium competitors
Provides 1200mg of krill oil per serving with clear omega-3 breakdown
MSC certified sustainable but no independent purity certification
$0.74/day - moderate pricing for the EPA/DHA content
Clear breakdown of omega-3s and phospholipids on the label
Prices checked 2026-03-31. Cost shown is per clinically effective daily dose, not per pill.
Krill Oil Supplement - 1250mg
Viva Naturals
IKOS certified with the highest astaxanthin yield (1600mcg) among products tested and a high 1250mg total krill oil dose
High total krill oil dose (1250mg) with proper omega-3 disclosure
IKOS certified for purity and potency
$0.83/day - premium pricing reflecting higher dose and IKOS certification
Full disclosure of EPA, DHA, phospholipids, and astaxanthin
Prices checked 2026-03-31. Cost shown is per clinically effective daily dose, not per pill.
Antarctic Krill Oil 2000mg
Carlyle
Despite the high 2000mg total krill oil claim, actual EPA/DHA content (120mg) lags significantly behind premium products at similar doses
Despite the 2000mg claim, EPA/DHA yield is disproportionately low, indicating diluted or lower concentration oil
No independent testing or GMP certification documentation
$0.47/day - affordable but quality concerns undermine the value proposition
EPA and DHA disclosed but the low omega-3 yield relative to total oil volume raises questions
Prices checked 2026-03-31. Cost shown is per clinically effective daily dose, not per pill.
Antarctic Krill Oil 1000mg
Dr. Mercola
Higher astaxanthin content (1000mcg) than competitors, but extremely poor value per milligram of EPA/DHA
Standard krill oil with proper EPA/DHA disclosure
GMP certified but no independent third-party purity certification
$1.93/day - exceptionally expensive per milligram of EPA/DHA
Full disclosure of EPA, DHA, phospholipids, and astaxanthin content
Prices checked 2026-03-31. Cost shown is per clinically effective daily dose, not per pill.
MegaRed Extra Strength 500mg Krill Oil
Schiff
Small easy-to-swallow softgels but significantly underdosed with only 94mg combined EPA/DHA per serving and very low astaxanthin
Underdosed at just 500mg per serving with only 94mg combined EPA/DHA - well below clinical thresholds
GMP certified but no independent third-party purity certification
$0.64/day - moderate, but poor per mg of actual omega-3 content
Full disclosure of EPA, DHA, phospholipids, and astaxanthin on the label
Prices checked 2026-03-31. Cost shown is per clinically effective daily dose, not per pill.
Antarctic Krill Oil 1000 mg
Bronson
Phospholipid content is surprisingly low (200mg per 1000mg) suggesting potential blending or inferior extraction
Standard krill oil with adequate EPA/DHA disclosure
No verifiable GMP or third-party certifications, phospholipid content is suspiciously low
$0.66/day - moderate pricing but quality concerns reduce effective value
EPA and DHA disclosed but unusually low phospholipid content raises blending questions
Prices checked 2026-03-31. Cost shown is per clinically effective daily dose, not per pill.
Antarctic Krill Oil 2000mg
Horbaach
Proprietary blend completely hides EPA and DHA content, no independent certifications, impossible to evaluate against clinical data
Proprietary blend fails to disclose EPA and DHA per serving - clinical evidence cannot be applied
No independent certifications, no GMP documentation
Cannot calculate value - actual omega-3 content is unknown due to proprietary blend
Proprietary blend that completely hides EPA and DHA amounts, making informed comparison impossible
Prices checked 2026-03-31. Cost shown is per clinically effective daily dose, not per pill.
Full Comparison
| Category | Neptune Krill Oil 500 mg NOW Foods | Krill Oil Supplement with EPA & DHA - 1000mg Sports Research | Krill Oil 500 mg Jarrow Formulas | Pure Antarctic Krill Oil Multi-Benefit Omega-3 1200mg Softgels Kori | Krill Oil Supplement - 1250mg Viva Naturals | Antarctic Krill Oil 2000mg Carlyle | Antarctic Krill Oil 1000mg Dr. Mercola | MegaRed Extra Strength 500mg Krill Oil Schiff | Antarctic Krill Oil 1000 mg Bronson | Antarctic Krill Oil 2000mg Horbaach |
|---|---|---|---|---|---|---|---|---|---|---|
| Overall | B+ | B+ | B | B | B | B- | B- | C+ | C+ | D- |
| Evidence | B | B | B | B | B | B | B | C | B | F |
| Quality & Purity | C | B | C | C | B | D | C | C | D | D |
| Value | A | B | B | C | C | B | F | C | C | F |
| Transparency | A | A | A | A | A | B | A | A | B | D |
| Cost/Day | $0.35 | $0.57 | $0.52 | $0.74 | $0.83 | $0.47 | $1.93 | $0.64 | $0.66 | $0.00Winner |
| Dose/Serving | 1000mg | 1000mg | 1000mg | 1200mg | 1250mg | 2000mg | 1000mg | 500mg | 1000mg | 2000mg |
| Form | Phospholipid-bound (NKO) | Phospholipid-bound (Superba 2) | Phospholipid-bound (K-Real) | Phospholipid-bound | Phospholipid-bound | Phospholipid Omega-3 Complex | Phospholipid-bound | Phospholipid-bound | Phospholipid-bound | Krill Oil Proprietary Blend |
| Third-Party Tested | No | ✓ Yes | No | No | ✓ Yes | No | No | No | No | No |
| Proprietary Blend | No | No | No | No | No | No | No | No | No | Yes |
Who Should Take Krill Oil?
Individuals seeking omega-3 benefits who experience fishy aftertaste or GI distress from standard fish oil. People looking for combined omega-3s and mild antioxidant support from naturally occurring astaxanthin. Those looking to manage mild joint stiffness or optimize lipid profiles.
Who Should Avoid It?
Individuals with severe shellfish allergies - this is a critical contraindication as krill are crustaceans. Patients on blood thinners should consult a physician first due to mild anti-platelet effects. Individuals scheduled for surgery within 2 weeks should discontinue use.
Side Effects & Safety
Side effects are generally mild and less frequent than with standard fish oil. The most common include mild gastrointestinal upset and fishy aftertaste or belching (though significantly less common than with fish oil). At high doses, there is potential for a mild increase in bleeding time due to the anti-platelet effects of EPA and DHA.
Frequently Asked Questions
Is krill oil better than fish oil?
It depends on your priorities. Krill oil's phospholipid-bound omega-3s may be better absorbed per milligram, and it causes less fishy aftertaste. However, concentrated fish oil products deliver significantly more EPA and DHA per serving at a lower cost. For basic omega-3 supplementation at the best price per gram of EPA/DHA, fish oil wins. For tolerability and potentially better absorption, krill oil has advantages.
How much EPA and DHA does krill oil actually provide?
Most 1,000mg krill oil softgels provide only 120-165mg of combined EPA and DHA. This is substantially less than a typical fish oil capsule (300-500mg EPA/DHA per 1,000mg). You may need 2-3 krill oil softgels to match the EPA/DHA content of one concentrated fish oil capsule, though the phospholipid form may partially offset this through better absorption.
Can I take krill oil if I have a shellfish allergy?
This requires extreme caution. Krill are crustaceans, and while the allergenic proteins in shellfish are primarily in the flesh rather than the oil, there is potential for cross-contamination. Most allergists advise against krill oil for individuals with known shellfish allergies. Consult your allergist before use.
What is the astaxanthin in krill oil?
Astaxanthin is a naturally occurring carotenoid antioxidant that gives krill (and salmon, shrimp, and flamingos) their red-pink color. It serves a dual purpose in krill oil supplements: it helps prevent the omega-3s from oxidizing (extending shelf life and freshness) and may provide its own antioxidant benefits. Amounts vary significantly between products, from 17mcg to 1,600mcg per serving.
What does IKOS certification mean for krill oil?
IKOS (International Krill Oil Standards) is a third-party certification program that verifies the purity, potency, and freshness of krill oil products. Products with IKOS certification have been independently tested for heavy metals, oxidation levels, and accurate labeling of EPA/DHA content. It is one of the strongest quality indicators for krill oil.
Is krill oil sustainable?
Antarctic krill is one of the most abundant biomass species on Earth, and krill harvesting is regulated by the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR). Many premium krill oil brands carry MSC (Marine Stewardship Council) or Friend of the Sea certifications indicating sustainable harvesting practices. Current harvest levels represent less than 1% of estimated biomass.
Sources
- Ulven SM, et al. Metabolic effects of krill oil are essentially similar to those of fish oil but at lower dose of EPA and DHA, in healthy volunteers. Lipids. 2011;46(1):37-46.
- Maki KC, et al. Krill oil supplementation increases plasma concentrations of eicosapentaenoic and docosahexaenoic acids in overweight and obese men and women. Nutr Res. 2009;29(9):609-15.
- Deutsch L. Evaluation of the effect of Neptune Krill Oil on chronic inflammation and arthritic symptoms. J Am Coll Nutr. 2007;26(1):39-48.
- Ramprasath VR, et al. Enhanced increase of omega-3 index in healthy individuals with response to 4-week n-3 fatty acid supplementation from krill oil versus fish oil. Lipids Health Dis. 2013;12:178.
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products discussed on this page are not intended to diagnose, treat, cure, or prevent any disease. Always consult with a qualified healthcare professional before starting any supplement regimen.