Breastfed children, whether full-term or preterm, should be added to complementary foods at 6 months (6 months corrected for prematurity). Premature infants should be added complementary foods at 4-6 months of corrected age. Because parents do not understand this situation, complementary foods are added too early, for example, a normal child born at 32 weeks, according to the birth age of 5 months began to add complementary foods, because the prematurity of 2 months, the corrective age of only 3 months, so add too early, the child can not tolerate the added complementary foods, causing diarrhea, affecting the health and normal development of the child. Why should complementary foods be added? Breastfeeding cannot meet the infant’s energy and various nutrient needs, such as the mother’s iron stored in the liver in the late fetal stage has been used up and needs food to supplement iron and other nutrients. As the infant grows up and becomes more active, milk as a fluid does not meet the energy needs of the larger infant. And to prepare for weaning from breast milk in the future. At 6 months, infants have the ability to digest and absorb complementary foods. As the digestive system matures, milk teeth begin to erupt, the mouth has the ability to bite, chew, and swallow non-liquid foods, and neuromuscular coordination continues to develop; infants develop an appreciation for foods of different colors, shapes, and tastes; the gastrointestinal digestive and absorptive capacity soon increases, and the excretory capacity of the kidneys improves, gradually equipping them with the ability to digest and absorb complementary foods. It is conducive to the development of language and communication skills and the cultivation of good eating behavior. When parents feed, it is also an important time for parents and children to communicate with each other, which plays a great role in promoting the infant’s mental development such as intelligence and emotion. The opportunity to exercise the infant’s oral muscles and tongue movements is an important process for future language development and the development of good eating behaviors. What are the negative effects of adding complementary foods too late to the child? The adverse effects of adding complementary foods late (after 6 months of age): 1. can lead to infants not getting the nutrition they need, hindering growth and development, and the consequences of malnutrition and micronutrient deficiencies. 2, is not conducive to promoting the potential of growth and development. 3, affect the opportunity to exercise the infant’s oral muscles and tongue movement, which is not conducive to future language development and the important process of developing good eating behavior. 4.Eating behavior problems such as partial eating, picky eating and refusal to eat may occur. 5.Later learning performance, interpersonal communication, social behavior and other social adaptability may be affected. How to add complementary foods to babies? First of all, we should emphasize the principle of adding complementary foods: it is recommended to add complementary foods at 6 months of age, from one to many, from less to more, from thin to thick, from fine to coarse, add gradually, do not be too hasty. Add iron-containing rice flour first. Feed before breastfeeding, one flat spoonful of rice flour, mix it with warm water to make a thin burst, feed it with a small spoon, press the lower lip to the tongue, and let the baby slowly experience the new way of eating. Mothers feed and show their babies how to chew to teach them how to eat. If the baby digests well and has normal stools, the amount of rice flour can be increased at intervals of 3-5 days, gradually increasing. If you have diarrhea and more food residue in the stool, you can maintain the original amount and reduce the amount or even suspend the complementary food as appropriate. Rice flour added about 10 days, you can add vegetable puree. At first, you can use root vegetables, for example, carrot puree, pumpkin puree, pea puree can be. Each kind of addition should be observed for 3 to 5 days to see if there are any allergies. Then add fruit puree. Use a small spoon to scrape the apple into a puree. You can feed them once between feedings. If your baby is allergic to apples, then eat steamed or boiled apples and a little bit less mashed banana, depending on your baby’s digestive ability. It is better to add vegetable puree first, then fruit puree. Because fruit is sweeter, babies will prefer it, so once babies develop a preference for fruit, it will be difficult for them to be interested in vegetables. Many parents, add egg yolks to their babies first. Because some babies are prone to allergies, egg yolk is a heterogeneous protein and the baby’s intestinal immune function is not yet mature enough to lead to eczema and allergic diarrhea. Therefore, it is now recommended to start feeding after 7 months of age. Please note that the amount of milk should not be reduced while adding complementary foods (800~1000ml per day), otherwise, the weight gain will be slowed down.