Krill oil vs fish oil comes down to one trade-off: a 600 mg krill softgel versus a 1000 mg fish oil softgel. Krill delivers omega-3 as phospholipids with astaxanthin, while fish oil packs more EPA and DHA per softgel for less money.
A 600 mg krill softgel carries less omega-3 than a 1000 mg fish oil softgel, and the krill absorption edge in trials is modest and still debated. This article covers what the published evidence actually shows: how the two oils differ in form, what the bioavailability studies found, the cost and dose math, and who should pick which.
Quick Answer: Krill Oil vs Fish Oil
Krill oil vs fish oil is a draw on omega-3 quality, but fish oil wins on value. Fish oil gives more EPA+DHA per dose at a lower cost-per-mg, while krill adds phospholipids and astaxanthin with a small, debated absorption edge. Most people get more omega-3 for the money from a 1000 mg fish oil softgel.
Key Takeaways
- Krill carries omega-3 as phospholipids; fish oil uses 1 ester form.
- Fish oil packs more omega-3 per softgel: 1000 mg vs 600 mg.
- Krill's absorption edge stays modest across 2 key research reviews.
- Krill naturally adds astaxanthin; standard fish oil contains 0 antioxidant.
- Cost-per-mg of omega-3 runs clearly higher for krill oil softgels.
- Both forms raise the omega-3 index at matched EPA+DHA doses.
Krill Oil vs Fish Oil: The Core Difference
Krill oil and fish oil both supply the omega-3 fatty acids EPA and DHA, but they package them differently. Krill carries omega-3 bound to phospholipids, the same molecule class found in your cell membranes, while standard fish oil delivers omega-3 as triglycerides or ethyl esters. That single structural difference drives most of the marketing claims you will see.
The other headline difference is astaxanthin. Krill naturally contains this red antioxidant, which also keeps the oil stable, whereas fish oil contains none unless it is added.
- Source: krill is a small Antarctic crustacean; fish oil comes from oily fish.
- Carrier: krill = phospholipid; fish oil = triglyceride or ethyl ester.
- Antioxidant: krill includes astaxanthin; fish oil does not.
- Dose density: fish oil softgels usually hold more total omega-3.
Both forms still deliver the same active fatty acids your body uses. The differences matter most for absorption, cost, and how easily you can hit a daily target.
Comparing Our Krill Oil and Fish Oil
The clearest way to judge krill oil vs fish oil is to compare two real products side by side. The table below uses the actual specs of our Virgin Krill Oil and our fish oil softgels, so you can see the dose and value gap rather than rely on marketing language.
| Feature | Virgin Krill Oil | Ultimate Omega-3 Fish Oil |
|---|---|---|
| Oil per softgel | 600 mg | 1000 mg |
| Omega-3 carrier | Phospholipid | Triglyceride/ester |
| Astaxanthin | Yes, naturally | No |
| Softgels per bottle | 60 | 90 |
| Price | $24.99 | $22.99 |
The takeaway is plain: you pay more for krill yet get less total omega-3 per softgel. That gap shapes nearly every buying decision below.
Is Krill Oil Better Absorbed Than Fish Oil?
Krill oil may absorb slightly more efficiently than fish oil, but the advantage is modest and the science is mixed. Because krill omega-3 is phospholipid-bound, some studies report faster uptake into blood and tissues than ethyl-ester fish oil[1]Krill Oil vs Fish Oil Bioavailability — Vascular Health and Risk Management (2015) View source.
Other reviews are more cautious. A broad analysis of omega-3 bioavailability concluded that form matters, yet taking any oil with a fat-containing meal narrows the gap considerably[2]Omega-3 Bioavailability Review — Progress in Lipid Research (2014) View source.
- Some studies: krill omega-3 absorbed faster than ethyl-ester fish oil.
- Other reviews: the gap nearly closes when taken with food.
- Practical takeaway: a small, debated edge, not a decisive one.
The honest reading of the data: any absorption edge for krill is small and still debated, and it does not offset the lower omega-3 content per softgel.
One trial did find krill raised the omega-3 index in healthy adults, supporting the phospholipid-carrier idea[3]Krill Oil and the Omega-3 Index — Lipids in Health and Disease (2013) View source. But matched-dose fish oil does the same, which is why most experts treat the difference as practically minor.
What About Astaxanthin and Phospholipids?
Astaxanthin is krill oil's genuine extra. This carotenoid antioxidant protects the oil from oxidation and gives krill its red color, and phospholipid-bound omega-3 may integrate into cell membranes well[4]Phospholipid Krill Oil — Food & Function (2024) View source. These are real, plausible benefits unique to krill.
The caution is dose. The astaxanthin amount in a krill softgel is small, and the omega-3 payload is still lower than a 1000 mg fish oil softgel.
- Astaxanthin: a real antioxidant bonus, but in small amounts.
- Phospholipid form: may support membrane uptake; benefit is modest.
- Bottom line: nice extras that do not outweigh the dose-and-cost gap.
If your main goal is hitting an EPA+DHA target, fish oil reaches it faster and cheaper than krill.
Cost and Dose Math: Which Is Better Value?
Fish oil is the better value for raw omega-3, and the math is simple. A 1000 mg fish oil softgel holds more EPA+DHA than a 600 mg krill softgel, costs less per bottle, and gives 90 servings versus 60.
This matters because the strongest omega-3 evidence, such as triglyceride lowering, is dose-dependent on EPA+DHA milligrams, not on the carrier form[5]Omega-3 and Triglycerides Meta-Analysis — Medicine (2023) View source. If you need a meaningful daily dose, getting there cheaply favors fish oil.
| Priority | Better pick |
|---|---|
| Most EPA+DHA per dollar | Fish oil |
| Astaxanthin antioxidant | Krill oil |
| Hitting a high daily target | Fish oil |
| Smaller softgel, no fishy taste | Krill oil |
To match a fish oil dose with krill, you often need more softgels, which widens the price gap even further over a month of use.
Who Should Pick Krill, and Who Should Pick Fish Oil?
Choose based on your priority, not the marketing. Fish oil suits anyone who wants the most omega-3 per dollar or needs a higher daily EPA+DHA target, which is why our Ultimate Omega-3 Fish Oil is the everyday default for most people.
Krill suits people who prefer a smaller softgel, want the astaxanthin antioxidant, or find krill easier on digestion with fewer fishy aftertastes.
- Pick fish oil if: value and dose density are your priority.
- Pick krill if: you want astaxanthin or a smaller, gentler softgel.
- Either way: dose by EPA+DHA mg and take with food.
Whichever you choose, match the dose by EPA+DHA milligrams and take it with a meal for best absorption. Omega-3 form is only one decision among several worth understanding before you buy.
Frequently Asked Questions
Is krill oil better than fish oil? +
Neither is clearly better; it depends on your goal. Krill adds astaxanthin and may absorb slightly better, but the edge is modest and debated. Fish oil delivers more EPA+DHA per softgel (1000 mg vs 600 mg krill) at a lower cost-per-mg, so it wins on value for most people.
Why is krill oil more expensive than fish oil? +
Krill is harvested in Antarctic waters and processed to preserve its phospholipids and astaxanthin, which raises the cost. A 60-softgel krill bottle at $24.99 holds 600 mg per softgel, while a 90-softgel fish oil bottle at $22.99 holds 1000 mg, so you pay more for less omega-3.
Does krill oil have more EPA and DHA than fish oil? +
No, fish oil usually has more per softgel. A 1000 mg fish oil softgel carries more total omega-3 than a 600 mg krill softgel. To match a fish oil dose with krill, you often need 2 or more softgels, which increases cost and pill count.
Is krill oil really 3 times better absorbed? +
The 3x claim is overstated. Some studies show a modest absorption edge for phospholipid krill omega-3 over ethyl-ester fish oil, but other reviews find the gap shrinks once you take either oil with a fat-containing meal. The honest reading is a small, debated difference, not a 3-fold one.
What is astaxanthin and does it matter? +
Astaxanthin is a red antioxidant carotenoid naturally found in krill oil. It protects the oil from going rancid and may offer antioxidant support. The amount in 1 krill softgel is small, so treat it as a useful bonus rather than the main reason to choose krill over fish oil.
Is krill oil or fish oil better for triglycerides? +
Both can lower triglycerides because the effect depends on EPA+DHA dose, not the carrier. Meta-analysis shows triglyceride lowering is dose-dependent, so the oil that lets you reach a higher EPA+DHA intake affordably has the advantage. For most budgets, that is fish oil at 1000 mg per softgel.
Does krill oil cause fewer fishy burps? +
Many people report fewer fishy burps with krill oil, partly because the softgels are smaller and the oil resists oxidation. Results vary by person. Taking either oil with food, refrigerating it, and choosing a fresh product all reduce aftertaste regardless of which form you use.
Can I take krill oil and fish oil together? +
Yes, you can combine them, but it is rarely necessary. Both supply EPA and DHA, so taking both mainly raises your total omega-3 intake and cost. If you do combine them, count the EPA+DHA from each toward your daily target and avoid exceeding 3 grams a day without clinician guidance.
Which is better for the brain, krill or fish oil? +
Both deliver DHA, the main structural omega-3 in the brain, so neither has a proven brain advantage. The phospholipid form in krill is theoretically appealing for membranes, but human evidence does not show a clear cognitive edge. Reaching an adequate DHA intake matters more than the carrier form.
Is krill oil safe with blood thinners? +
Use caution and ask your clinician first. Like fish oil, krill supplies omega-3 that can mildly affect clotting. One study found fish oil did not significantly change INR with warfarin, but individual responses vary, so anyone on anticoagulants should review supplement use with a healthcare provider.
How much krill oil equals a fish oil dose? +
Match by EPA+DHA milligrams, not softgel count. Because a 600 mg krill softgel carries less omega-3 than a 1000 mg fish oil softgel, you typically need more krill softgels to reach the same EPA+DHA. Check both labels and add up the EPA+DHA to compare fairly.
Is krill oil more sustainable than fish oil? +
Antarctic krill fisheries are managed by international quotas and certified harvesters, while fish oil sustainability depends on the source species. Both can be responsibly sourced. Look for transparent sourcing and third-party testing on either product rather than assuming 1 form is automatically greener.
Which should I buy if I just want the basics? +
For most people starting out, fish oil offers the best balance: more omega-3 per softgel at a lower price, with 90 servings per bottle. Choose krill if you specifically want astaxanthin, smaller softgels, or have struggled with fishy aftertaste from standard fish oil.
Related Reading
- Remedy's evidence-based omega-3 overview
- Research on what omega-3 does
- Omega-3 for Heart Health: What the Evidence Says
- How omega-3 supports the brain
- The fish oil dosing guide
- Fish oil safety and interactions
- Remedy's omega 3-6-9 explainer
