If sabi po ni pedia, then better follow them po. But if not, once a day is usually enough, kasi they should be getting the rest of their vitamin C from their food (or milk if hindi pa nagstart mag-solids si baby). Excess vit C gets passed through the urine po, sayang lang din kung di rin naaabsorb ni baby.
Pag vitamins c po kahit once a day lang or depende po sa advise ng pedia ni baby