Ay, good question! Based sa experience ko and ng kaibigan ko, pwede naman mag-combine ng vitamins for different ages, pero honestly, mas safe na i-check mo muna with your pedia para sure sa dosage at which ones are okay together, bawat bata iba-iba kasi ang needs at some vitamins can interact, at gusto mo lang talaga na tama ang amounts, no? Usually ang pedi mag-recommend ng specific brand or formulation na safe for both ages, or baka kailangan separate pa rin depende sa nutrients.