Comparative guide
Fish oil vs krill oil
Krill oil is sold as if the phospholipid form were a better fish oil. Sometimes a blood level moves more. Sometimes the clinical score does not. Read the dose, not the shellfish.
| Trial | What happened |
|---|---|
| Ramprasath 2013, 24 adults, 4 weeks, 600 mg omega-3 from each oil | Krill raised the omega-3 index more than fish oil. Triglycerides and HDL did not change. Total and LDL cholesterol rose after both oils versus corn oil. No adverse events reported. |
| Sung 2020, 11 women, 30 days, similar EPA and DHA grams | Krill produced a greater plasma EPA response. The lipid patterns were not the same. This is 11 people. |
| Acik 2025, depression, 8 weeks | Krill (520 mg EPA+DHA) and fish oil (600 mg) both beat placebo on a depression scale. Neither beat the other. |
| Guarneiri 2023, single dose, 24 adults | A phospholipid-enriched fish oil and krill oil produced a similar 24-hour EPA+DHA rise. That fish oil was not an ordinary triglyceride oil. |
Buy on the EPA and DHA milligrams and the price. A 4-week index change in 24 people is not a reason to pay several times more for the same grams. The depression trial is the one that asked who felt better, and it found no winner.
Ramprasath (PMID 24304605, NCT01323036) drew published comments. This page uses the trial abstract, not those letters. Sung: PMID 32933153. Acik: PMID 40118278. Guarneiri: PMID 37413768. Algal oil, for people who do not eat fish, is the existing fish oil vs algal oil page. A narrative overview is fish, algal, and krill.