Krill Oil and Cognitive Function
Krill oil is well established to have many positive effects on physiological function, but there are few studies published that describe the effects of krill oil on brain function. This study investigated the influence of krill oil on cognitive function in elderly subjects by using near-infrared spectroscopy and electroencephalography.
Three types of supplements were used in the study: krill oil, representing a phospholipid form of omega 3 fatty acids, sardine oil to represent conventional triglyceride forms of omega 3’s, and medium-chain triglycerides (MCT oil) as placebo. The supplements were supplied in soft gelatin capsules containing 250mg of oil per capsule, and the subjects were asked to take four capsules twice a day after breakfast and dinner for 12 weeks.
The conclusion was that: “This study provides evidence that Omega-3 Polyunsaturated fatty acids activate cognitive function in the elderly. This is especially the case with krill oil, in which the majority of Omega 3’s are incorporated into phosphatidylcholine, causing it to be more effective than sardine oil, in which Omega 3’s are present as triglycerides. The Omega 3’s bound to phosphatidylcholine in krill oil may thus be taken up by the brain tissues more readily than the Omega 3’s of sardine oil, most likely bringing about the observed difference in their effects.”
Krill oil is unique in that being a phospholipid form it is absorbed into the cells far more efficiently than other fish oil products, which all exist in the triglyceride form. It should be noted that each NutriKrill capsule contain 500mg of krill oil; therefore, to mimic this study, one would only need 2 capsule twice daily. http://nutristart.com/products/krill-oil/
Clin Interv Aging. 2013; 8: 1247–1257. “Effects of krill oil containing n-3 polyunsaturated fatty acids in phospholipid form on human brain function: a randomized controlled trial in healthy elderly volunteers.” Chizuru Konagai, et al. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3789637/