Long-chain omega-3 polyunsaturated fatty acids (ω3 FA) are involved in numerous cell responses. 1,2 These essential fatty acids are vital for the mammalian organism, 3 since a lack of ∆-12-desaturase and ∆-15-desaturase in the human organism-unlike in plant organisms-makes synthesizing higher polyunsaturated fatty acids, such as ω3 FA or linolenic acid, impossible. ω3 FA are involved in cell membrane-stabilization and can be found in varying proportions, depending on the cell type. Immune cell membranes demonstrate a particularly high occurrence. 3,4 Many studies in humans demonstrated significant immunomodulatory effects of the marine, longchain ω3 FA 5 ; however, the overall benefit is still controversially discussed. There is a consensus that the ω3 FA-index (percentage
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