Black Currant Oil [Immune] is a rich source of gamma-linolenic acid (GLA) along with other important polyunsaturated fatty acids. Fatty acids are involved in many body functions, such as maintaining body temperature, insulating nerves, cushioning and protecting tissues and creating energy. These essential fatty acids are precursors of prostaglandins, which must be present for functions involved with dilating blood vessels, supporting arterial pressure, metabolizing cholesterol, activating T-lymphocytes, protecting against platelet aggregation, controlling abnormal cell proliferation and other functions. Before the discovery of black currant oil, the only other known sources of GLA were mother’s milk and evening primrose oil. Each black currant oil capsule contains 16–18 percent GLA (more than evening primrose oil), provides two essential fatty acids—linoleic acid and alpha-linolenic acid—and the unique stearidonic acid. Take 1 capsule with a meal three times daily. Refrigerate after opening.