Evening primrose oil is a natural source of gamma-linolenic acid (GLA) and linoleic acid (LA), omega 6 polyunsaturated fatty acids. Research shows that women with PMS are deficient in GLA. Other studies show that people with difficult menopause, inflammation, skin problems, and hyperactive youth may be deficient in essential fatty acids, including GLA.UseRECOMMENDED USESource of essential fatty acids for the maintenance of good health.RECOMMENDED DOSEAdult (oral): 1 to 2 capsules, twice daily. Best taken with food. CompositionMEDICINAL INGREDIENTS1,300 mg Evening Primrose Oil (Oenothera biennis) (seed oil)NON-MEDICINAL INGREDIENTSGelatinRisk InformationKeep out of reach of children.LicenseThis product is approved by Health Canada and its license number is 80001021.