1,3-Dimyristoyl-2-eicosapentaenoyl glycerol (MEM) is a triacylglycerol with myristic acid at the sn-1 and sn-3 positions and eicosapentaenoic acid at the sn-2 position. The presence of myristoyl groups in MEM does not impact the oxidative stability of eicosapentaenoic acid (EPA) during prolonged storage at 25°C.