Fish oil is one of those supplements. One of the ones everybody takes. It is chock full of beneficial omega-3s and antioxidants. It lowers “bad cholesterol” and increases “good cholesterol”. It may prevent some of the effects of Alzheimer’s, treat depression, and protect against Parkinson’s. It’s an impressive supplement. But, it lags significantly behind krill oil in every category for which it is famous. Just like how chia seeds appear to be better than flax, krill is better than fish. Two caveats: if you have a shellfish allergy krill oil is not for you and krill oil costs a bit more than fish oil. Some experts wonder if it is worth the extra cost.
Krill is a tiny shrimp-like crustacean. Despite their size krill is thought to make up more animal biomass on earth than any other animal. Whales love these little creatures, they eat them by the tons every day. And this mass consumption doesn’t put a dent in krill population. The arctic and antarctic oceans are packed with these guys. They are sustainable, and there are safeguards to keep them sustainable.
The biggest thing that makes krill oil more effective than fish oil is the form in which the Omega-3s are provided. In fish oil, they’re provided in triglycerides, while in krill they come in phopholipids. Phospholipids are the same fats that are in our cell membranes. This common bond makes them more absorbable into the cell.
Dr. Michael Eades says:
Krill oil contains vitamin E, vitamin A, vitamin D and canthaxanthin, which is — like astaxanthin — a potent anti-oxidant. The anti-oxidant potency of krill oil is such that when compared to fish oil in terms of ORAC (Oxygen Radical Absorptance Capacity) values, it was found to be 48 times more potent than fish oil.
Considering the effacacy of krill oil over fish oil I think it is the time to make the switch.
Wikipedia: Krill Oil