Holland & Barrett's Cod Liver Oil is high in omega 3 fatty acids and provides an excellent source of vitamins A and D. Both Vitamins A and D contribute to the normal function of the immune system Vitamin A also contributes to the maintenance of normal skin, whilst Vitamin D contributes to the maintenance of normal bones and muscle function. For your convenience this product also contains a selection of vitamins providing you with further nutritional support. Holland & Barrett's Cod Liver Oil is high in omega 3 fatty acids and provides an excellent source of vitamins A and D. Both Vitamins A and D contribute to the normal function of the immune system Vitamin A also contributes to the maintenance of normal skin, whilst Vitamin D contributes to the maintenance of normal bones and muscle function. For your convenience this product also contains a selection of vitamins providing you with further nutritional support.