Virbac Megaderm - dietary supplement is a tasty complementary food to promote the health of skin and coat. Megaderm is rich in omega-3 and omega-6 fatty acids from sunflower and evening primrose oil. Sources rich in linoleic acid. The supplement differs from other products in that evening primrose oil is one of the few oils that contains gamma-linolenic acid. The omega-6 fatty acids are obtained from sunflower and evening primrose oil. These are very rich in linoleic acid. The various components care for the coat and support its health.