In general, it is better to add egg yolks to infants and young children around 7-8 months of age, but the specifics still need to be determined in the light of the child’s development. Egg yolk is also an important complementary food for infants and toddlers, which can be added gradually and appropriately at around 7-8 months of age under normal circumstances. The first complementary food for infants should be high iron rice powder, and then gradually add pureed fruits and vegetables. Generally speaking, egg yolks are added in small amounts and in a gradual manner. First, put a quarter of the egg yolk into the rice flour or milk powder, mix it into a fine paste, and then feed it with a spoon. If there is no bloating or diarrhea, the dose can be gradually increased. If allergies such as vomiting, bloating, or skin rashes occur, discontinue intake and seek medical attention to determine if medical intervention is needed.