Babies can eat protein appropriately around 7-9 months. When babies add complementary food around six months, the first complementary food is recommended to be high iron rice flour. After the addition of rice flour, the gastrointestinal tract gradually adapted, you can start to add egg yolk to your child. Then gradually transition to other foods. Egg white is mainly composed of protein, containing amino acids needed for the growth and development of the baby, rich in nutritional value, generally around 7-9 months of the baby can add egg white as appropriate. However, it is worth noting that egg white is a common allergen. So when adding egg whites, start with one-quarter egg white, and if there is no allergy, slowly change to one-half and then to one egg white. If there is an allergy, stop adding it immediately. If your baby is not feeling well from eating egg whites, it is recommended to seek medical attention.