A daily dose of the recommended intake of omega- 3 and omega-6 essential fatty acids. Blackmores Evening Primrose Oil + Fish Oil contains omega-3 and omega-6 essential fatty acids, which are important for the structure and function of cell membranes and growth of skin and hair.Evening primrose oil (EPO) is a source of the omega-6 fatty acids gamma-linolenic acid (GLA) and linoleic acid (LA). Fish oil is a source of the omega-3 essential fatty acids, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Essential fatty acids are incorporated into every cell membrane in the body, in the form of compounds called phospholipids. Cell membranes play the vital role of regulating what goes into, and what comes out of, each cell. The integrity and fluidity of the cell membrane is determined by the type of phospholipid that is available for the body to use. Cell membranes made up mainly of phospholipids derived from the essential polyunsaturated fatty acids are more fluid and function bett Blackmores Evening Primrose Oil + Fish Oil Cap X 100.