my son is 13 months old.Recently when he stand or walk, both leg are wide open which people are suggesting lack of vitamin d in body. please advice

A. In the early stages of walking it is normal for children to waddle and walk with their feet apart. They may often also appear bow-legged, knock-kneed or flat-footed, they may walk tiptoe or with their toes turned in or out. These are all variations of normal, which naturally resolve with time.