Jigsaw Alaskan Cod Liver Oil is a comprehensive cod liver oil supplement with omega-3 fatty acids, PRMs (pro-resolving mediators), and Vitamins A & D, all naturally occurring as formed by nature. Synthetic forms of Vitamins A & D are never used in this product. PRMs are natural substances derived from omega-3 fatty acids that act as “braking signals” to modify cell behavior and promote healthy, normal cell function.*