(1,383mg/cap) 60 Capsules. Evening primrose oil (EPO) contains gamma-linolenic acid (GLA), an omega-6 fatty acid that may help ease acne, manage eczema symptoms, and improve skin hydration, (PMS) symptoms, reduce hot flash severity during menopause, and support heart health by affecting cholesterol levels. WARNING:It may interact with blood thinners and blood pressure medications.