Differential plasma postprandial lipidomic responses to krill oil and fish oil supplementations in women: A randomized crossover study

Hyunsin H. Sung, Andrew J. Sinclair, Kevin Huynh, Alexander T. Smith, Natalie A. Mellett, Peter J. Meikle, Xiao Q. Su

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Objectives: There is no convincing evidence that krill oil (KO) consumption results in a higher incorporation of long chain ω-3 polyunsaturated fatty acids into blood lipid fractions than fish oil (FO). This study examined the postprandial plasma lipidomic responses to KO supplementation compared with FO supplementation in healthy women. Methods: Ten women (aged 18–45 y) consumed a high-fat (15 g of olive oil) breakfast, supplemented with 5 g of KO or FO in a randomized crossover study with a minimum 7-d washout period between the supplementations. Plasma samples collected at the fasting state and at 3 and 5 h postprandially were analyzed using liquid chromatography electrospray ionization–tandem mass spectrometry. Results: After the supplementations, 5 out of 34 lipid classes or subclasses had significantly greater concentrations from KO compared with FO. There were 27 molecular species including 5 ether-phospholipid species, out of a total of 701, which had significant differences between supplementations in the postprandial period. Eicosapentaenoic acid and docosahexaenoic acid from KO were preferentially partitioned toward phospholipid molecular species, whereas eicosapentaenoic acid and docosahexaenoic acid from FO were preferentially partitioned toward neutral lipids.

Original languageEnglish
Pages (from-to)191-201
Number of pages11
JournalNutrition
Volume65
DOIs
Publication statusPublished - 1 Sep 2019

Keywords

  • DHA
  • EPA
  • Fish oil
  • Krill oil
  • Phospholipids
  • Postprandial lipidomic response
  • Triacylglycerol

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