When should I add complementary foods to my baby? The correct time to add complementary foods is between 4 and 6 months of age when pureed foods are added. Adding too early or too late is not good for the growth and development of infants. 1. Adding too early: 1) The stimulation decreases due to the short sucking time, which reduces the secretion of breast milk and can lead to malnutrition in serious cases. When the squeeze reflex of the infant’s tongue has not disappeared and the infant refuses to spoon feed solid food, the mother will mistakenly think that the infant refuses food, prolonging the process of introducing solid food. (2) Premature addition makes exposure to pathogens in food increase, causing diarrhea. (3) Premature addition of complementary foods also predisposes to overfeeding. (4) infants are still small, can not accurately swallow solid food, may cause choking. 2, too late to add: 1) breastfeeding to establish the conditioned reflexes firmly, weaning difficulties. (2) breast milk alone can not meet the growth needs of 6-month-old infants and growth lag. Breast milk does not meet the nutritional needs of infants and micronutrient deficiencies occur, especially iron and zinc. 3) Delayed development of oral feeding skills. 3) Poorly developed sense of taste and the infant’s reluctance to accept new tastes and textures of food.