From Dr. Mercola:
For many years now, my favorite source of omega-3 fats — if you are not regularly eating safe sources of seafood like wild Alaskan salmon, sardines or anchovies — has been krill oil. In fact, I was one of the first to promote krill as an exceptional source of animal-based omega-3.
Krill oil is often compared to fish oil, but there are actually a number of differences between the two that makes krill a more ideal option. I was initially criticized for my recommendation of krill as a healthier and more environmentally friendly option than fish oil.
But over the years krill began receiving more attention by researchers, and each time a new study about krill oil hit the journals, its list of health benefits grew longer and the differences between fish oil and krill oil became more clearly pronounced.
Advantages of Krill Oil Over Fish Oil
Research shows krill oil has a number of advantages over fish oil, including the following:
✓ Higher potency
Researchers gave subjects less than 63 percent as much krill-based EPA/DHA as the fish oil group, yet both groups showed equivalent blood levels — meaning the krill was more potent.
✓ Contains phospholipids
Fatty acids are water soluble, but they can’t be transported in their free form in your blood — they require “packaging” into lipoprotein vehicles. In krill oil, the omega-3 fat is attached to phospholipids, which means your body can readily absorb it.
In fish oil, the omega-3s are attached to triglycerides that must be broken down in your gut to its base fatty acids of DHA and EPA. About 80 to 85 percent is simply eliminated in your intestine. Studies confirm krill oil is absorbed 10 to 15 times better than fish oil.
It’s also able to efficiently cross your blood-brain barrier to reach important brain structures.
Phospholipids are also one of the principal compounds in high-density lipoproteins (HDL), which you want more of, and by allowing your cells to maintain structural integrity, phospholipids help your cells function properly. (You can learn more about this in the video above.)
✓ Contains phosphatidylcholine
When you consume fish oil, your liver has to attach it to phosphatidylcholine in order for it to be utilized by your body. Krill oil already contains phosphatidylcholine, which is another reason for its superior bioavailability.
Phosphatidylcholine is composed partly of choline, the precursor for the vital neurotransmitter acetylcholine, which sends nerve signals to your brain, and for trimethylglycine, which protects your liver.
Choline is important to brain development, learning and memory. In fact, choline plays a vital role in fetal and infant brain development, so it’s particularly important if you are pregnant or nursing.
✓ Resists oxidation