Effects of duration of treatment and dosage of eicosapentaenoic acid and stearidonic acid on red blood cell eicosapentaenoic acid content

E. S. Krul, S. L. Lemke, R. Mukherjea, M. L. Taylor, D. A. Goldstein, H. Su, P. Liu, A. Lawless, W. S. Harris, K. C. Maki

Research output: Contribution to journalArticle

45 Scopus citations

Abstract

Objective: The purpose of this randomized, controlled, parallel group study was to characterize the relationships between dosages of stearidonic acid (SDA) and eicosapentaenoic acid (EPA), and incorporation of EPA into red blood cell (RBC) membranes over time. Methods: Healthy subjects (n=131) received capsules with placebo (safflower oil), SDA (0.43, 1.3, 2.6, or 5.2. g/d) or EPA (0.44, 1.3, or 2.7. g/d) for 12 weeks. RBC fatty acids were analyzed biweekly. Results: RBC %EPA increased in all EPA and SDA groups (p<0.02 vs. control) except the 0.43. g/d SDA group (p=0.187). For theoretical intakes of EPA of 0.25, 0.5, and 0.89. g/d, the amounts of SDA needed to achieve equivalent RBC EPA enrichment were 0.61, 1.89, and 5.32. g/d (conversion efficiencies of 41%, 26%, and 17%), respectively. Conclusions: SDA increased RBC %EPA in a dosage and time-dependent manner at intakes as low as 1.3. g/d.

Original languageEnglish (US)
Pages (from-to)51-59
Number of pages9
JournalProstaglandins Leukotrienes and Essential Fatty Acids
Volume86
Issue number1-2
DOIs
StatePublished - Jan 1 2012

Keywords

  • Dosage-response
  • Eicosapentaenoic acid
  • Omega-3 fatty acids
  • RBC
  • Stearidonic acid

ASJC Scopus subject areas

  • Clinical Biochemistry
  • Cell Biology

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    Krul, E. S., Lemke, S. L., Mukherjea, R., Taylor, M. L., Goldstein, D. A., Su, H., Liu, P., Lawless, A., Harris, W. S., & Maki, K. C. (2012). Effects of duration of treatment and dosage of eicosapentaenoic acid and stearidonic acid on red blood cell eicosapentaenoic acid content. Prostaglandins Leukotrienes and Essential Fatty Acids, 86(1-2), 51-59. https://doi.org/10.1016/j.plefa.2011.10.005