Not every krill oil is the same, and the differences are worth understanding before comparing products. This page sums up the criteria that suppliers and nutrition writers most often point to.
Four qualities to compare
- EPA and DHA levels. The two omega-3s doing most of the work. Look for the amount per serving rather than the amount of oil.
- Phospholipid content. Phospholipids carry the omega-3s in krill oil and form part of every cell membrane. Higher concentrations are usually presented as a sign of a better extract.
- Astaxanthin. The antioxidant pigment that gives the oil its deep red colour.
- Traceable, sustainable sourcing. Reputable products can name the fishery, the certification and the regulator involved.
Some brands add that their oil is free of toxins and contaminants, 100 percent pure, all natural and free of genetically modified ingredients. Independent lab reports are the best way to check statements of this kind.
The comparison with fish oil
Brands often summarise the contrast as faster absorption, smaller capsules and no fishy aftertaste. A figure of 2.5 times better absorption is quoted by one supplier and is tied to one clinical study report from Germany dated 2009. It is sensible to treat it as a supplier claim.
Wording regulators allow
In Canada-style product licensing, krill oil labels may use limited statements such as these:
- a source of omega-3 fatty acids, EPA and DHA, for the maintenance of good health;
- helps maintain cardiovascular health;
- used alongside conventional statin therapy, helps with markers such as triglycerides and cholesterol;
- helps to reduce pain associated with osteoarthritis;
- helps relieve symptoms of premenstrual syndrome.
These phrases describe what a licence permits and do not guarantee a result for any individual. Please discuss any condition with a health professional.
Sustainability in short
Antarctic krill is harvested under quotas set by CCAMLR, and the industry points out that only a small fraction of the biomass is taken. Details are on our sustainability page and the general overview is in the guide to Antarctic krill.
Reading further
The source site recommended a consumer book on krill, “The Thrill of Krill”, for readers who want a longer introduction. We list it here only as a title mentioned by the original publisher and have not reviewed it.