Baby’s hair grows slowly for several reasons: the first reason, the baby is not a calcium deficiency. If the baby has vitamin D deficiency rickets, this situation may lead to the baby’s hair grows slowly, in this case it is recommended to give supplemental vitamin D, at the same time pay attention to more sunshine, promote calcium absorption, to promote the baby’s hair growth is also beneficial; the second reason, the baby’s genetic factors, if the parents have less hair, and then grow slowly, this situation baby may be Hair growth is slow, and genetic factors are related, so do not worry, pay attention to strengthen the nutrition can, slowly and will improve after growing up. The third reason, there are some lack of trace elements, such as a lack of zinc or vitamin deficiency, can cause this situation.