Ay, honestly, for better sleep ka talaga usually it's more about the routine at feeding niya, hindi lang vitamins, pero if you're concerned na deficient siya, better check with your pedia kung ano talaga kailangan niya based sa age at diet niya. A few of us naman, pag nag-start kami ng Vitamin D at iron supplements na prescribed ng doctor, napansin namin mas okay ang energy at mood ng kids during the day, which helped with bedtime na rin kasi hindi na hyperactive.