#asktheexpert my daughter was having iron deficiency. she was cranky and her speech was not proper. doctor gave her tonoferon 80 mg. her weight is 15 kg. she is 4 year old. after iron supplement for 3 months her speech improved a lot and her crankyness gone. now should I still give iron supplement for daily rda that is 40 mg. or should I first do blood test and check. which blood test do you recommend?