Wellbaby Vit D Drops has been carefully developed by Vitabiotics’ nutritional experts, and provides the level of Vitamin D for young infants, as recommended by the UK Department of Health. Suitable for infants from 0 months to 4 years. A baby is born with 300 bones and during the first years of your baby’s life the bones are growing rapidly. Wellbaby Vit D Drops provide vitamin D (as D3, the body’s preferred form of Vitamin D). Vitamin D is needed for normal growth and development of bones in children. It also contributes to their normal immune system function.