Vitamins that can boost appetite

Hi mga mamshies, i have been using propan tlc since nag 6mos ang baby ko and it worked kc matakaw sya..pero after nya mag one year old bigla syang humina sa pagkain..like ung isusubo mo plang ayaw na tlga nya..i have tried different recipes for him pero ayaw nya..should i try a different vitamins for him?