Guaranteed to Yield 117 mg (9%) GLA Per Softgel Gluten Free A Primrose Oil supplement to support skin and nerve health and premenstrual functional needs. We pledge total truth in labeling. Our family of products contains only the purest and most potent ingredients. Guaranteed. Gamma-Lin™ 1300 is a dietary supplement to support skin and nerve health and premenstrual functional needs. Gamma-Lin™ is a pure vegetable oil processed from the seeds of the Evening Primrose plant. Oil of Evening Primrose is 70% Linoleic Acid and is unique in providing a direct dietary source of the vital Gamma Linolenic Acid. DaVinci® Laboratories guarantees a minimum of 117 mg (9%) Gamma Linolenic Acid (GLA) per 1300 mg capsule and a minimum of 45 mg (9%) Gamma Linolenic Acid (GLA) per 500 mg capsule. Gamma Linolenic Acid (GLA) is converted by natural processes in the body to prostaglandins, which have a range of important functions such as regulation of brain function and the immune system.