This daily dose may help a range of conditions.

Evening primrose oil which is extracted from the seed of the plant has been shown to have a beneficial effect on a range of medical conditions including inducing weight loss without dieting, lowering cholesterol levels and blood pressure, alleviating arthritis, healing or improving eczema and acne ( which can be used with zinc ), and relieving premenstrual tension, and IBS.
Evening primrose oil capsules can be bought from health food stores.