Vitamin is one of the essential nutrients for the human body every day, and vitamin deficiency can lead to poor development (including mental development) in babies, and in serious cases, rickets, night terrors and other diseases. So how do you know if your baby is deficient in vitamins? There are many kinds of vitamins, and how do you know which one your baby is deficient in? You can do the following tests for your baby at home: 1. Is your baby’s skin dry and rough? 2. Is your baby’s hair thinning and dry? 3.Does your baby have dry and photophobic eyes? 4.Does your baby have a poor appetite? 5.Does your baby have indigestion? 6.Is your baby’s skin slightly red with fine flakes? 7.Is your baby’s tongue and lips slightly sore? 8.Does your baby’s skin have a rash when exposed to the sun? 9.Is your baby’s skin thickened and rough? 10.Does your baby have bleeding gums? 11.Does your baby have nasal mucous membrane bleeding? 12.Does your baby have bruises that do not go away after a slight bump? 13.Does your baby sweat a lot? 14.Is your baby easily irritable and restless? 15.Does your baby have a yellowish complexion? 16.Does your baby have bleeding spots on the skin? 17.Is your baby’s skin dry and flaky? If your baby has one or more of these symptoms, your baby is probably deficient in one or more vitamins. Symptoms 1,2,3 – vitamin A deficiency; Symptoms 4,5 – vitamin B1 deficiency; Symptoms 6,7 – vitamin B2 deficiency; Symptoms 8,9 — niacin deficiency; Symptoms 10,11 — vitamin C deficiency; Symptoms 12 — vitamin K deficiency; Symptoms 13,14 –Symptom 15,16 – vitamin D deficiency; Symptom 15,16 – folic acid deficiency; Symptom 17 – vitamin E deficiency. In fact, generally speaking, as long as the baby’s diet is balanced, there is no vitamin deficiency. However, in modern life, due to many reasons, such as food processing, excessive cooking and unreasonable eating habits, it is often difficult to balance the daily diet, and the baby’s food is liquid, semi-liquid or burnt food with monotonous varieties, which makes it easier to cause insufficient intake of nutrients. Therefore, parents must pay attention to the baby’s daily diet in the baby’s nutritional balance, good eating habits to have a good body, the baby’s best start in life is guaranteed.