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  • Title: A randomized trial comparing omega-3 fatty acid plasma levels after ingestion of emulsified and non-emulsified cod liver oil formulations.
    Author: Conus N, Burgher-Kennedy N, van den Berg F, Kaur Datta G.
    Journal: Curr Med Res Opin; 2019 Apr; 35(4):587-593. PubMed ID: 30106311.
    Abstract:
    OBJECTIVES: Emulsified formulations of omega-3 fatty acids may increase plasma concentrations of docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) compared with non-emulsified formulations. The current study evaluated plasma concentrations of DHA + EPA as well as DHA and EPA individually following administration of emulsified vs non-emulsified cod liver oil formulations. METHODS: In this randomized, 2-period, crossover study (ClinicalTrials.gov NCT02428699), 47 healthy adults received single doses of an emulsified cod liver oil formulation and a non-emulsified cod liver oil formulation, each containing 10% cod liver oil plus 10% cod oil and closely matched DHA and EPA content. Blood samples were collected for 24 h after dosing to analyze DHA and EPA plasma concentrations using a validated methodology. DHA + EPA, DHA, and EPA pharmacokinetics were compared using an analysis of covariance model. The incremental area under the plasma concentration curve at 24 h (iAUC0-24 h) for DHA + EPA was the primary endpoint. RESULTS: DHA + EPA, DHA, and EPA plasma concentrations reached higher levels in plasma following administration of the emulsified vs non-emulsified formulation. The emulsified cod liver oil formulation produced iAUC0-24 h values for DHA + EPA, DHA, and EPA that were 1.66, 1.78, and 1.64 times higher, respectively, than the non-emulsified formulation; iAUC0-10 h values were 1.84, 1.96, and 1.79 times higher, respectively (all p < 0.01). Maximum concentrations of DHA + EPA, DHA, and EPA in plasma were significantly higher for the emulsified than the non-emulsified formulation (p < 0.001). CONCLUSIONS: DHA + EPA, DHA, and EPA plasma concentrations were significantly higher for the emulsified cod liver oil supplement vs the reference non-emulsified cod liver oil supplement.
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