Introduction: Vitamins are one of the essential nutrients that the human body needs every day, and vitamin deficiency can lead to poor development (including intellectual development) of the baby, and in serious cases, rickets, night terrors and other diseases. Then how to know whether the baby lacks vitamins? There are many kinds of vitamins, and how to know which vitamin your baby lacks? You can do the following tests for your baby at home: 1. Does your baby have dry and rough skin? 2. Does your baby have thin and dry hair? 3. Does your baby have dry eyes? 4, your baby is not appetite? 5.Does your baby have indigestion? 6.Does your baby have reddish skin with fine flakes? 7.Does your baby have a slightly sore tongue and lips? 8, Does your baby’s skin become blotchy 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 bleeding from the nasal mucosa? 12.Does your baby have a bruise after a slight bump, and it won’t go away for a long time? 13.Does your baby sweat a lot? 14, your baby is easily irritable? 15.Does your baby have a yellowish color? 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, it is likely that your baby is 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; and –Niacin deficiency; Symptoms 10,11 – Vitamin C deficiency; Symptom 12 – Vitamin K deficiency; Symptoms 13,14 –Vitamin D deficiency; Symptoms 15,16 – Folic acid deficiency; Symptom 17 – Vitamin E deficiency. In fact, generally speaking, as long as the baby’s diet is balanced, vitamins will not be deficient. However, due to a variety of reasons in modern life, such as food processing, overcooking and irrational eating habits, it is often difficult to balance the daily diet, and the baby’s food is fluid, semi-liquid or paste food, monotonous varieties, which makes it more likely to result in insufficient nutrient intake. Therefore, parents in the baby’s daily diet must pay attention to the baby’s nutritional balance, good eating habits will have a good body, the baby’s best start in life is guaranteed.