Many new parents have many questions when they are faced with giving their babies VD supplements. Today we are going to spread some general knowledge about how to supplement vitamin D. What new parents need to know Clinical manifestations of vitamin D deficiency In infants and young children with VD deficiency, calcium metabolism is seriously affected, and the main manifestations are non-specific neuropsychiatric symptoms in the early stage, such as excessive sweating, night terrors, restlessness, etc. In severe cases, skeletal changes can occur, such as late teething, late closure of fontanelle, soft cranial suture, square skull, “ping-pong feeling” when pressing on the occipital bone The skeletal changes may occur in severe cases, such as late teething, late closure of fontanelle, soft cranial suture, square skull, ping-pong feeling when pressing the occipital bone, rib “beads” in the chest, rib edge outward, “chicken chest” and scoliosis, turtle back, etc. The limbs may have “bracelets”, “foot bracelets”, X-rays, etc, “foot bracelet”, X-leg, O-leg and other changes. The onset of the disease is slow and easy to be ignored. Once obvious symptoms appear, the body’s resistance will be reduced, and it is easy to complicate pneumonia, diarrhea and other diseases. The source of human vitamin D 1, skin light synthesis which is the main source of human VD The ultraviolet ray in light irradiates the skin, which will convert 7-dehydrocholesterol in the skin into VD. In summer, it is necessary to expose the skin as much as possible and directly under sufficient sunlight for at least 2 hours in order to synthesize the physiological amount of VD needed. but infants and young children have weak resistance, and with the fierce summer sun, many In addition, many parents have many misconceptions, such as the belief that the sun can also play a role in synthesizing vitamin D through the glass, and it is enough to sunbathe in the shade outdoors, and some mothers have to give their babies full armor, such as with sun hats and umbrellas, in fact, in this case, the amount of vitamin D synthesized by the baby is The amount of vitamin D synthesized by the baby is greatly discounted, and the synthetic vitamin D can be said to be a trace, so it is important to give infants and children extra vitamin D supplements, even in the heat of summer. 2.VD in food is the exogenous source of VD for infants and toddlers Natural food including breast milk contains very little VD, cereals, vegetables and fruits contain almost no vitamin D. Egg yolk, fish, milk and breast milk contain a small amount of VD, and an egg yolk contains only 27-40 IU of vitamin D. However, infants and toddlers have to supplement 400-800 international units (IU) of vitamin D every day, so to get enough VD from natural It is almost impossible to get enough VD from food, so it is important to give your baby extra vitamin D supplements in order to get the adequate amount of vitamin D needed for growth and development.