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Krill oil

Supplement fatty acid heart & metabolicbone & joint
Aka: Euphausia superba, Antarctic krill, Superba
Brands seen in Singapore: California Gold Nutrition, Sports Research, Micro Ingredients, Futurebiotics, NOW Foods
Third-party tested: Sports Research certifies other products with NSF Certified for Sport, but nothing for krill oil.Certification is granted per product, so check the tub you actually own. Not being listed is not the same as failing.
Not medical advice. Check with your doctor or pharmacist before you start, stop or change the timing of anything you take.
How to use
What it’s for
LDL and triglycerides in pooled trials · knee oa mixed
When to take
Daily
Studied for
Pooled lipid trials ran 2 weeks or longer
Pros & cons
Pros
  • LDL −15.5 mg/dl and tg −14 mg/dl in 7 pooled RCTS
  • Pain, stiffness and function better in 5 knee-oa RCTS
  • Omega-3s come phospholipid-bound; uptake data split
Cons
  • Adverse events matched usual care; pain relief unclear
  • Bad taste, breath, heartburn, nausea, diarrhea
  • Krill is a crustacean — shellfish allergy matters
Sources
  1. NIH ODS — Omega-3 Fatty Acids (Health Professional): Dietary Supplements — krill oil form and bioavailability · read 2026-08-27
    what it says
    “Krill oil contains omega-3s primarily as phospholipids. Some studies suggest that these phospholipids have somewhat higher bioavailability than the omega-3s in fish oil, whereas other studies do not.”
  2. NIH ODS — Omega-3 Fatty Acids (Health Professional): Health Risks from Excessive Omega-3s — no UL, FDA 5 g/day · read 2026-08-27
    what it says
    “The IOM did not establish a UL for any omega-3s … FDA has concluded that dietary supplements providing no more than 5 g/day EPA and DHA are safe when used as recommended.”
  3. NIH ODS — Omega-3 Fatty Acids (Health Professional): commonly reported side effects · read 2026-08-27
    what it says
    “Commonly reported side effects of omega-3 supplements are usually mild. These include unpleasant taste, bad breath, heartburn, nausea, gastrointestinal discomfort, diarrhea, headache, and odoriferous sweat.”
  4. NIH ODS — Omega-3 Fatty Acids (Health Professional): Interactions with Medications — anticoagulants · read 2026-08-27
    what it says
    “Fish oil might prolong clotting times, as indicated by an elevated international normalized ratio (INR), when it is taken with warfarin, but most research indicates that doses of 3–6 g/day fish oil do not significantly affect the anticoagulant status”
  5. Lipid-modifying effects of krill oil in humans: systematic review and meta-analysis of randomized controlled trials (Ursoniu et al., Nutr Rev 2017;75:361-373) — results · read 2026-08-27
    what it says
    “Meta-analysis of data from 7 eligible trials (14 treatment arms) with 662 participants showed a significant reduction in plasma concentrations of low-density lipoprotein cholesterol (WMD, -15.52 mg/dL …) and triglycerides (WMD, -14.03 mg/dL …)”
  6. Ursoniu et al., Nutr Rev 2017 — study selection (minimum supplementation period) · read 2026-08-27
    what it says
    “Randomized controlled trials that investigated the impact of at least 2 weeks of supplementation with krill oil on plasma/serum concentrations of at least one of the main lipid parameters”
  7. Ursoniu et al., Nutr Rev 2017 — context (what krill oil is, strength of evidence) · read 2026-08-27
    what it says
    “Some experimental and clinical trials have shown that krill oil, extracted from small red crustaceans, might be an effective lipid-modifying agent, but the evidence is not conclusive.”
  8. Krill oil for knee osteoarthritis: a meta-analysis of randomized controlled trials (Medicine (Baltimore) 2025; PMID 39960912) — results · read 2026-08-27
    what it says
    “Five randomized controlled trials involving 730 participants were included … no significant improvement in knee osteoarthritis as measured by visual analog scale; however, it exhibited significant benefits in terms of pain (SMD -0.60), stiffness, and functional outcomes”
  9. Krill oil for knee osteoarthritis meta-analysis (Medicine 2025) — conclusion and adverse events · read 2026-08-27
    what it says
    “adverse events in the krill oil group and usual care group also showed no statistical difference … Krill oil presents as a promising safe therapeutic option for knee osteoarthritis; however, its efficacy in pain relief requires further investigation.”
  10. HSA — Health Supplements Guidelines GL-CHPB-3-001 Rev. 020 (January 2026), s3.1 working definition + clause 4.8 · read 2026-08-27
    what it says
    “Vitamins, minerals, amino acids, fatty acids, enzymes, probiotics and other bioactive substances … HS for use by the general adult population should not contain vitamins and minerals exceeding the stipulated limits stated in Tables 4 and 5.”
  11. HSA — Guidelines on Prohibited and Restricted Ingredients in HS and TM, GL-CHPB-1-012 Rev. 001 (Oct 2025), clause 1.3 + Annex A/B — searched, no row for krill, krill oil or Euphausia · read 2026-08-27
    what it says
    “The objective of this guideline is to highlight the substances of concern when used in HS and TM and is not meant to be an exhaustive list.”
  12. iHerb Singapore — 'Krill Oil' category page, default order, 1 - 48 of 71 results · read 2026-08-27
    what it says
    “California Gold Nutrition, Premium Krill Oil with SUPERBABoost®, 1,000 mg … Sports Research, Omega-3 Krill Oil, 1,000 mg … Micro Ingredients, Antarctic Krill Oil (500 mg per Softgel) … Futurebiotics, Antarctic Krill Oil with Astaxanthin … NOW Foods, Krill 1000”
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Updated 2026-08-30. Every line above traces to a numbered source. Kozen-X is not a medical device and does not give medical advice. It lists what published sources have written down — nothing more. A pair not listed is unrecorded, not cleared. Before you start, stop or re-time anything, talk to your doctor or pharmacist.