EPO is rich in linolenic acid and γ- Fatty acids in the form of linolenic acid (GLA). Since linolenic acid cannot be synthesized by the human body, it must be consumed. NiceNature Oenothera biennis oil cold pressed contains 10% of the active ingredient gamma linolenic acid (GLA), which is specially formulated to help support healthy female hormone balance and help relieve premenstrual tension (PMT) symptoms.