Relationship in Oxidation between Eicosapentaenoic Acid and Docosahexaenoic Acid in Microencapsulated Isada Krill Oil

Abstract

Krill oil extracted from Euphausia pacifica, known as Isada on the Sanriku coast, is rich in eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) as well as other polyunsaturated fatty acids (PUFAs). We previously reported that the oxidation of EPA and DHA in microencapsulated krill oil with a low surface-oil ratio was interdependent and the contribution of other n-3 PUFAs on the oxidation was not considered (J. Oleo Sci., 70, 633 (2021)). This study demonstrated that EPA and DHA were also interdependently oxidized in microencapsulated krill oil with both low and high surface-oil ratios even though the contribution of oxidized PUFAs on the oxidation of EPA and DHA was taken into consideration.