Breast milk provides all the nutrients that your newborn needs. You should try to breastfeed your baby until 6 months. If this is not possible ask your pediatrician for advice. Breast milk provides the necessary energy and all important nutrients for your baby’s growth and development. The only ones it doesn't provide are vitamins D and K. Your baby needs additional sources of vitamin D until 4 years and, in the first 3 months of life, vitamin K. Your pediatrician will advise you on how best to do this.