Seven Seas Cod Liver Oil Maximum Strength Liquid 5 Pack contain Omega-3 Fish Oils and Vitamins D & E for the perfect way to maintain healthy hair, skin, nails and supple joints. The fluid supplement contains EPA and DHA nutrients which are essential in keeping a well-rounded healthy lifestyle. The difference between regular and High Strength Cod Liver Oil is simply the volume of vitamins stored in the capsules. The High Strength may be more suitable for someone who requires them for supple and flexible joints a lot more than the average person looking to take them for healthy living purposes. Please note that results may vary.