Breastfeeding is ideal for infants because it is best adapted to infant's specific needs. It is important that nursing mothers eat properly before and during breastfeeding. A combination of bottle and breast feeding may interfere with exclusive breastfeeding and it is difficult to go back to breastfeeding once the decision has been taken not to breastfeed. When using an infant formula, when the mother cannot or does not want to breastfeed, it is important to strictly follow the instructions for preparation and use, and the recommendations of the medical profession. Incorrect use of infant formulas may endanger the infant's health. Socioeconomic factors should be taken into consideration when choosing the method of infant nutrition.