Krill are shrimp-like crustaceans. The oil extracted from these crustaceans, quoting one well-known nutritional scientist, “contains important omega-3 fatty acids such as EPA and DHA, fatty acids found in fish oils. Krill oil also has a high amount of a potent antioxidant called astaxanthin along with small amounts of vitamin A and vitamin E, and perhaps small amounts of other undetermined beneficial compounds.” As far as which is better, this particular nutritional scientist writes, “We often get asked whether krill oil is a better option as a supplement than fish oil or vice versa. Fish oil has a higher percentage of EPA and DHA fatty acids; however krill oil has the advantage of having astaxanthin, an important antioxidant, vitamins A and D, and possibly other nutrients such as small amounts of phospholipids.”
I personally believe that krill oil has benefits. However, I’ve looked at the EPA/DHA content of a variety of krill oil supplements and none of them contain nearly the same amount per 1000 mg as does most-to-all fish oil supplements, including Carlson Norwegian Salmon Oil. Also, the vitamin A and D content is pretty miniscule in krill oil (roughly 100 IU of vitamin A and 10 IU of vitamin D per 1000 mg). You’re probably already getting those amounts, if not more, in your diet, plus you receive substantially greater supplemental amounts in our multivitamin/mineral supplement Premium Insurance Caps.
As far as astaxanthin (pronounced az-tuh-ZAN-thin) is concerned, I’m a huge fan of this nutrient, which is why it’s one of the components in AO Booster. In general, most krill oil supplements contain about 1.5 mg of astaxanthin per 1000 mg. Each capsule of AO Booster contains 2.5 mg of astanxanthin, plus all 150 mg of all four tocopherols, 50 mg of all four tocotrienols, and 10 mg of lutein. This is an amazing fat-soluble antioxidant product that has a lot of benefits attached to it; in fact, I think it’s one of the most important products we’ve ever come out with. I discuss this product in more detail in Endurance News #61.
So with us already having an excellent fish oil supplement that contains high amounts of EPA/DHA, and with the multiple nutrients (including astaxanthin) in AO Booster, I personally don’t think it’s necessary to supplement with a Krill Oil product.