Breastmilk is rich in nutrients and will reduce the secretion of certain nutrients over time, but it does not lose its nutritional value. In general, after 6 months of life, the nutritional needs of infants increase and breastfeeding needs to be accompanied by the addition of complementary foods to meet their growth and development needs. Breast milk is the natural nutrition for infants, containing all the nutrients and antibodies necessary for their growth and development. It is complete and safe in terms of nutrients, such as rich proteins, fats, immunoglobulins and calcium and phosphorus, which are especially important for the growth and development of infants within 6 months. As a rule, breastfed babies have better immunity than formula-fed babies alone. In addition, after 6 months of delivery, the amount of protein, fat and immunoglobulin contained in milk gradually decreases and the infant’s nutritional needs increase at this time. Therefore, it is clinically recommended to exclusively breastfeed for 6 months, and after 6 months, complementary foods such as milk powder, rice flour and vegetable puree can be added appropriately. In general, infants can start practicing weaning after 6 months, and breastfeeding is best not to exceed 2 years old, depending on the mother’s physical condition.