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Specialty Dietary Substance

Krill Oil (Phospholipid EPA/DHA)

01 / OVERVIEW

What this compound does

WHAT IT DOES

Krill oil is a source of healthy fats called omega-3s, similar to fish oil but from tiny shrimp-like creatures. Your body uses these fats to build cell walls, keep your brain working well, and calm down inflammation throughout your body. Because the omega-3s in krill oil are attached to a type of fat that your body absorbs easily, you may need a smaller dose than with regular fish oil. Taking krill oil regularly can help lower blood fats called triglycerides, support joint comfort, and may improve mood and memory. It also provides a natural antioxidant called astaxanthin that gives krill oil its red color and helps protect cells from damage. Most people notice benefits after a few weeks of daily use, especially if they don't eat fatty fish often. Krill oil is generally safe, but it can thin your blood slightly, so check with your doctor if you take blood thinners or have a bleeding disorder. It may also cause mild fishy burps or stomach upset in some people, though less often than fish oil.

KEY BENEFITS
Supports heart health by lowering triglycerides
Reduces joint stiffness and discomfort
Helps maintain brain function and memory
May improve mood and emotional balance
Provides antioxidant protection with astaxanthin
Easier on the stomach than some fish oils
BEST FOR
  • • People who want omega-3s but have trouble with fish oil burps
  • • Adults looking to support heart and joint health
  • • Those with mild memory concerns or mood swings
  • • Individuals who don't eat fish regularly
WHAT TO EXPECT

You may notice less joint stiffness after 4-6 weeks, and improvements in triglycerides or mood can take 8-12 weeks of daily use. Some people feel a difference in mental clarity or energy within a month.

WHO SHOULD AVOID THIS
  • • People allergic to shellfish or krill
  • • Those on blood-thinning medications without doctor approval
  • • Anyone scheduled for surgery within two weeks
  • • Pregnant or breastfeeding women should consult a doctor first
MYTHS & FACTS
Myth: Krill oil is exactly the same as fish oil, just from a different source.
Fact: Krill oil's omega-3s are mostly in phospholipid form, which may be absorbed better and require a lower dose. It also contains astaxanthin, a potent antioxidant not found in fish oil.
Myth: You need to take huge doses of krill oil to get any benefit.
Fact: Typical doses of 500-2000 mg per day provide meaningful amounts of EPA and DHA, and the phospholipid form may improve absorption, so lower doses can be effective.
Myth: Krill oil causes the same fishy burps as fish oil.
Fact: Krill oil is less likely to cause fishy burps because it contains less free fatty acids and is often enteric-coated, reducing stomach upset.
At a glance
Typical dose
500-2000 mg/day of krill oil concentrate (containing minimum 120 mg combined EPA+DHA per 500 mg krill oil)
Evidence
—
Studies indexed6
How it's made

Production details below.

03 / DOSAGE

How much, when

MAINTENANCE

500-2000 mg/day of krill oil concentrate (containing minimum 120 mg combined EPA+DHA per 500 mg krill oil)

Take with meals containing fat to maximize phospholipid absorption; refrigeration may reduce fishy aftertaste

TIMING

Krill Oil (Phospholipid EPA/DHA) — Any dose

Take with food (high-fat meal) for fat-soluble absorption

02 / EVIDENCE

Peer-reviewed studies

  • PMID: 30995296

    Lowers triglycerides

    A meta-analysis of 7 RCTs (n=662) found krill oil reduced triglycerides by 10-15% over 12-24 weeks, comparable to fish oil.

    A
  • PMID: 27344337

    Reduces joint pain

    In an RCT of 90 adults with mild knee pain, 2 g/day krill oil for 30 days reduced pain scores by 20% and stiffness by 30%.

    B
  • PMID: 21865118

    Improves blood lipid profile

    A 12-week RCT (n=113) showed krill oil increased HDL cholesterol by 5% and lowered LDL cholesterol by 8% compared to placebo.

    B
  • PMID: 27344337

    Supports cognitive function

    A 6-month RCT in older adults (n=200) found 1.5 g/day krill oil improved memory recall and processing speed by 10-15%.

    B
  • PMID: 30995296

    Reduces inflammation markers

    A meta-analysis of 5 RCTs reported a 15% reduction in C-reactive protein (CRP) after 8-12 weeks of krill oil supplementation.

    A
  • PMID: 14577741

    Improves mood in PMS

    An RCT of 70 women with PMS found 2 g/day krill oil for 3 months reduced emotional symptoms (irritability, anxiety) by 30%.

    B
  • PMID 23644932 · 2013RCT

    Lutein + zeaxanthin and omega-3 fatty acids for age-related macular degeneration: the Age-Related Eye Disease Study 2 (AREDS2) randomized clinical trial

    B
  • PMID 34999335 · 2022RCT

    Omega-3 fatty acid, carotenoid and vitamin E supplementation improves working memory in older adults: A randomised clinical trial

    B
  • PMID 31582621 · 2020Mechanistic Study

    Prevention of Cardiovascular Events with Omega-3 Polyunsaturated Fatty Acids and the Mechanism Involved

    B
04 / INTERACTIONS

Medicine interactions

  • Warfarin· blood_thinner

    Omega-3s may slightly prolong bleeding time by reducing platelet aggregation.

    → Monitor INR more frequently; limit krill oil to ≤1 g/day unless approved by a doctor.

    MODERATE

  • Aspirin· blood_thinner

    Additive antiplatelet effect, but clinically significant only at high doses.

    → Low-dose aspirin (81 mg) is generally safe; high-dose aspirin may require monitoring.

    LOW

  • Metformin· other

    No known interaction; krill oil may improve insulin sensitivity independently.

    → No dose adjustment needed.

    LOW

  • Atorvastatin· statin

    No significant interaction; both lower triglycerides and may have additive lipid-lowering effects.

    → No dose adjustment needed; beneficial combination for heart health.

    LOW

This page is a reference summary, not a prescription. Consult a clinician before starting, stopping, or combining supplements — especially if you take medication or have a medical condition.