Breast milk is quite nutritious. And thus experts suggest that those babies who are breast fed don’t need any vitamin supplements. Thus, you can say that babies around six months of age do not need vitamin supplements. But, human milk may not provide that much vitamin D to the baby as required. In such a case, there are chances that the baby may be deficient in vitamin D. Vitamin D is required for growth and development of the baby. It is important to note that babies who are breast fed need 400 IU of vitamin D per day. And for babies the main source of vitamin D is sunlight. Taking baby out in sunlight for a few minutes can maintain the level of vitamin D in the body and that is enough. However, if mother is diagnosed as deficient in vitamins then her milk is not able to provide the required vitamins to the baby and so, vitamins supplement needs to be started after consulting the pediatric doctor. Another way of providing nutrients to baby is recommending vitamin supplements to mother. These vitamins can be passed on to the baby through milk. However, one must be careful with vitamin D. Excess of vitamin D is toxic and can create complications.