Usually pure milk can be drunk in small amounts for babies over one year old, but breast milk and/or formula is still recommended. For babies over one year old, plain milk can be drunk in small amounts. As the protein and mineral content of ordinary fresh milk, yogurt, cheese, etc. is much higher than that of breastmilk, which increases the burden on the kidneys of infants and young children, it is not suitable to be fed to infants aged between 7 and 12 months. For one-year-old babies, it can be used as part of food diversification to try gradually, but it is recommended that it be eaten in small quantities, and not as a complete substitute for breastmilk and/or formula milk. Parents are advised to pay attention to the reasonableness of the diet of one-year-old babies, and take them out for more activities and sunshine, which will help their growth and development.