He must be having nutrional iron deficiency that seems to be better with supplementation. U can give it for a maximum of 3 months (treatment duration of deficiency)

Thank you for your query Imax XT is an iron supplement and can be given for a period of up to three months Remember it’s not an appetite stimulant Also as your child’s weight is appropriate for his age and he’s active you need not worry about his appetite At this age most children don’t like to eat and they always want to play This is a temporary phase and as he grows up his appetite will also improve Never give any appetite stimulants as they are not recommended