Breast milk is the best for baby. The World Health Organization recommends exclusive breastfeeding for the first six months of life. Unnecessary introduction of bottle feeding, or other food drinks will have a negative impact on breastfeeding. After six months of age, infants receive age-appropriate food while breast milk continues up to two years old of age or beyond. Consult your doctor before deciding to use infant formula or if you have difficulty of breastfeeding.