More ‘traditional’ omega-3 supplements – such as cod liver oil and fish oil – on the market are based on omega-3 fatty acids bound to triglycerides or bound as ethyl esters, whereas krill oil contains a large number of omega-3 fatty acids bound to phospholipids, stated the researchers
Several previous studies have investigated krill oil, and there is growing evidence to suggest that the molecular form of omega-3 fatty acids may be of importance in their biological functions, as well as in the distribution of the omega-3 in the body. Previous research demonstrated that, when given to rats in equal amounts, krill oil and fish oil had different effects, with krill oil resulting in stronger effects in relation to metabolic syndrome.
A detailed description of the fatty acid profile of krill oil has revealed a high content of phospholipid omega-3 fatty acid, and may aid future product development. The study, published in Lipids provides a characterization of the phospholipid fatty acids profile of krill oil, revealing a high presence of long chain polyunsaturated fatty acids. “Krill oil provides the majority of its omega-3 fatty acids in the form of phospholipids, whereas other common marine oils contain omega-3 fatty acids in the form of triglycerides or ethyl esters,” wrote the researchers, led by Bjørn Winther at the University of Oslo.
The study was partially funded by Aker BioMarine ASA and was performed by researchers at the University of Oslo, in co-operation with researchers from Aker BioMarine. The krill oil tested was Superba Krill Oil, provided by Aker BioMarine ASA.
Published online ahead of print, doi: 10.1007/s11745-010-3472-6
“Elucidation of Phosphatidylcholine Composition in Krill Oil Extracted from Euphausia superba”
Authors: B. Winther, N. Hoem. K. Berge, L. Reubsaet