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