Our Fermented Skate Liver Oil capsules contain important fat-soluble nutrients including vitamins A & D and Omega 3, 6, 7 & and 9 Fatty Acids. Since these nutrients are all naturally occurring in the skate liver oil, the amounts will vary from batch to batch. The nutritional profile of skate liver oil is similar to cod liver oil; however, some customers find that the skate liver oil is more helpful in relation to joint health.