gamma-Linolenic acid
![The seed oil of Oenothera biennis (evening primrose) is a source of GLA](/Images/godic/202501/14/Middelste_teunis_bloem_R00118760607.JPG")
Gamma-linolenic acid or GLA (γ-Linolenic acid), (INN and USAN gamolenic acid) is a fatty acid found primarily in vegetable oils. When acting on GLA, 5-lipoxygenase produces no leukotrienes and the conversion by the enzyme of arachidonic acid to leukotrienes is inhibited.