Krill oil is a supplement that is rapidly gaining popularity as an alternative to fish oil. It is made from krill, a type of small crustacean consumed by whales, penguins and other sea creatures.
It is a source of docosahexaenoic acid (DHA) and Eicosapentaenoic acid (EPA), types of omega-3 fats found only in marine sources. They have important functions in the body and are linked to a variety of health benefits.
Both krill oil and fish oil contain the omega-3 fats EPA and DHA. However, some evidence suggests that the fats found in krill oil may be easier for the body to use than those from fish oil, since most omega-3 fats in fish oil are stored in the form of triglycerides.
On the other hand, a large portion of the omega-3 fats in krill oil can be found in the form of molecules called phospholipids, which may be easier to absorb into the bloodstream.