Introduction to baby complementary foods: Babies over 6 months old need complementary foods to supplement their nutrition. So how to give your baby healthy and nutritious complementary food? This article will give you a detailed introduction from four aspects: ingredient selection, cooking methods, dietary arrangements and precautions. Selection of food ingredients The choice of food ingredients is an important guarantee for healthy nutrition for your baby. The ingredients of baby complementary food are vegetables, fruits, meat and fish.