Health From The Sun 100 % Vegetarian Evening Primrose Oil 500 is the first evening primrose oil in a 100 % Vegetarian capsule. Each vegetarian capsule contains 500 mg of pure evening primrose oil, providing 95 mg of the important omega-6 fatty acid GLA per serving. GLA is a fatty acid which is rarely found in food. Hexane-free. Vitamin E & Vitamin C protect the oil from oxidation.