The fish oil vs. krill oil war continues with no clear winner. The question remains, which of the two is the better omega-3 source?
Obtained from oily fish such salmon, tuna, and halibut. Can be obtained by regularly eating fish and seafood, but this comes with certain health hazards due to contamination.
Fish Oil Pros
- Contains more DHA and EPA, two most important fatty acids, than krill oil.
- More extensively researched.
Fish Oil Cons
- Higher concentrations of contaminants such as mercury, lead, PCBs, and dioxins.
- Real concern about sustainability due to over-harvesting.
- More prone to oxidation and rancidity.
Obtained from a tiny, shrimp-like crustacean. It is mainly harvested from the pristine waters of the Antarctica.
Krill Oil Pros
- Greater bioavailability and absorption due to being bound in phospholipids.
- Contains higher levels of antioxidants vitamin A, vitamin E, and astaxanthin.
- Virtually no contaminants due to being low in the food chain.
- Krill said to be more sustainable than fish. These crustaceans exist by the billions in the oceans.
- Naturally contains vitamins E, which helps prevent oxidation and rancidity.
Krill Oil Cons
- Lower levels of DHA and EPA fatty acids (but higher absorption) than fish oil.
- Few published studies compared to fish oil.
- Costs more than fish oil.
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