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Fish Oil vs Krill Oil

Is krill worth the premium?

TL;DR

Krill oil may absorb slightly better and includes astaxanthin (antioxidant), but costs 3-5x more. Fish oil (triglyceride form) works great and is much cheaper. For most people, quality fish oil wins on value.

AFish Oil

Wins

  • +Much cheaper per gram EPA+DHA
  • +Extensive research base
  • +TG form absorbs excellently
  • +Higher EPA+DHA per serving typically
  • +Easier to get therapeutic doses affordably

Loses

  • -Some get fishy burps (freezing helps)
  • -Requires refrigeration after opening
  • -Environmental concerns with some sources
  • -Ethyl ester form absorbs less well

BKrill Oil

Wins

  • +Phospholipid form (may absorb slightly better)
  • +Contains astaxanthin (antioxidant)
  • +Less likely to cause fishy burps
  • +Smaller pills often
  • +Sustainable harvesting

Loses

  • -3-5x more expensive
  • -Lower EPA+DHA per serving
  • -Need more pills for same dose
  • -Less research overall
  • -The absorption advantage is modest

The Verdict

Fish oil (TG form) for most people. Krill if money isn't a concern.

The absorption advantage of krill is real but small (maybe 10-30%). Fish oil TG form also absorbs very well. You get more omega-3s per dollar with fish oil. Unless you really want the astaxanthin or hate fish burps, save your money.

Choose Fish Oil When:

  • You want best value
  • You need higher doses (heart health, triglycerides)
  • You don't mind refrigerating
  • Budget is a factor
  • You found a quality IFOS-certified brand

Choose Krill Oil When:

  • Fish burps are a real problem for you
  • You want the antioxidant benefits
  • Money isn't a concern
  • You prefer smaller pills
  • Sustainability is important to you

The Bottom Line

Fish oil TG form offers better value for most. Krill is a premium option with modest benefits.

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About this information: Our recommendations draw from peer-reviewed clinical trials, systematic reviews, and the same medical databases your doctor uses. These statements have not been evaluated by the FDA. Supplements are not intended to diagnose, treat, cure, or prevent any disease.

Moderate Evidence

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