1. What is complementary food? Complementary food refers to other solid or liquid foods added to the baby within six months after birth, in addition to breast milk or formula milk. It provides extra nutrients and energy to babies, promoting their growth and development. 2. Why should we add complementary foods? As babies grow and develop, breast milk or formula milk can no longer meet their needs. Adding appropriate complementary foods at this time can provide more types of nutrients, such as iron, zinc, vitamins, etc., and help develop the baby\’s oral and digestive functions. 3. When to add complementary foods According to the World Health Organization