Evening primrose oil is one of the most miraculous discoveries to prevent many diseases and disorders. It contains Vitamin C and phenylalanine which are useful in relieving pain, headaches, aging problems, and signs of menopause, obesity, PMS, and many more. This oil is obtained from the seed of the evening primrose plant. This is also used in foods as a dietary source of fatty acids. It is widely used in the manufacturing of soaps and cosmetics.