Recent studies have supported the role of vit D supplementation in newborns, which have to be given to all newborns and children. My question is whether Vit D alone is sufficient or it has to be given with calcium ?

Also what is the role of multivitamin drops apart from Vit D in newborn, is there evidence regarding use and role of B comlex vit in newborn period? Should calcium be given to every newborn who is taking Vit D drops?