Babies are usually allowed to consume salt appropriately after one year of age. When babies are less than 1 year old, the amount of salt they need daily is very small, and daily feeding can usually meet their needs without additional salt. When babies are between 1 and 3 years old, they need about 2g of salt per day, and between 3 and 5 years old, they need about 3g of salt per day. Therefore, babies do not need to eat salt until after they are 1 year old. Salt is generally not allowed within 1 year of age. But for babies over 1 year old, don’t add too much salt in complementary food, if too much salt is added, the baby will cause thirst after consumption, which will make the baby drink a lot of water, and then aggravate the burden on the heart and kidneys. If the baby drinks a lot of water will lead to increased sweating, thus losing more calcium, which may lead to the symptoms of calcium deficiency. To summarize the above factors, it is recommended that babies can eat salt in moderation after one year of age.