- Nature’s #1 source of essential vitamins A and D
- Promotes strong bones, healthy eyes, skin and immune function
- High bioavailability softgels deliver 2,500 IU of vitamin A and 270 IU of vitamin D Swanson Double-Strength Cod Liver Oil is a step above traditional cod liver oils. This high- potency formula features vitamins A and D to promote strong bones and healthy eyes, skin and immune function. Each softgel delivers 2,500 IU of vitamin A and 270 IU of vitamin D for effective daily supplementation.