At what age can infants begin complementary feeding?

　　Six months of age is the optimal time to introduce complementary foods to infants. Introducing solids before four months is not recommended; minor adjustments may be made only if developmental milestones are met. Complementary foods primarily address the insufficient iron content in breast milk. If an infant’s weight gain slows significantly or the baby persistently refuses feeding, prompt medical evaluation of feeding practices is essential.

　　Around six months of age, infants’ gastrointestinal digestive enzymes gradually mature, the extrusion (tongue-thrust) reflex disappears, and head control becomes stable—key physiological prerequisites for accepting complementary foods. Introducing solids too early places excessive strain on the immature digestive system, increasing the risk of diarrhea and allergic reactions. Initially, iron-fortified rice cereal is the preferred first food. Its consistency should progress gradually from thin to thicker, and only one new ingredient should be introduced at a time to monitor for tolerance and adverse reactions.

　　Delaying the introduction of complementary foods may lead to deficiencies in essential micronutrients such as iron and zinc, and may also cause infants to miss the critical window for developing chewing skills—potentially interfering with the establishment of healthy eating habits later on. During this stage, complementary feeding should emphasize exploration and sensory experience, while breast milk or formula remains the primary source of nutrition. If skin rashes or gastrointestinal disturbances occur during feeding, discontinue newly introduced foods, adjust the feeding schedule, and ensure gradual, gentle gastrointestinal adaptation.

　　Carefully balance milk intake with complementary food portions, progressively expand the variety of foods offered, follow the infant’s natural feeding rhythm, foster chewing and swallowing skills, ensure diverse nutrient intake, and thereby support healthy physical growth and development.