Does my breastfed baby need vitamin supplements?

I honestly believe that breastfed babies do not need supplements as most of the nutrients that they require are already found in the breastmilk. With the exception of Vitamin D, the other nutrients and vitamins are sufficient from the breastmilk. Otherwise, if you feel that you lack of a certain nutrient e.g. calcium, you can speak to your gynae and he would be able to advise and recommend to you better