Oilesen Vitamin D3 1000, soft capsules in Extra Virgin Olive Oil for Immunity and Bones – these products are intended to provide supplementary vitamin D3 for children, adolescents and adults, as well as individuals who may be housebound or who may avoid sun exposure.nVitamin D contributes to the maintenance of normal bones and teeth, normal muscle function and the normal function of the immune system, normal absorption/utilisation of calcium and phosphorus.nVitamin D is needed for normal growth and development of bone in children, it also contributes to the function of the immune system in children.