Usually, it is recommended that babies can eat salt after one year of age. Adding salt too early will increase the burden on the kidneys. Babies are born with weak kidney regulation and poor reserve capacity, and can only reach adult levels at 1-1.5 years of age. For babies within 1 year of age, supplemental foods are usually added at 4-6 months of age and can contain some sodium without additional addition. If the baby is over 1 year old, salt can be added in small amounts to the dishes the baby eats to adjust the taste, without the need to measure by adult standards. If too much or too early salt intake can easily cause sodium retention in the baby’s body, leading to oedema and other manifestations. In addition, a high-salt diet can also affect the absorption of zinc in the baby’s body, leading to zinc deficiency. In daily life, parents need to pay attention to the meat and vegetables of the baby’s diet and balanced nutrition, and it is not recommended to give salt to babies before the age of 1.