<prompt> True regarding glucose tolerance test are all except: September 2007Can be done in fasting as well as post prandial state1 gram of glucosekg body weight is administeredGlucose levels are checked after 2 hoursDiagnosis of diabets mellitus can be established  <response>: Ans. A: Can be done in fasting as well as post prandial stateOral GTT is done in fasting state.Blood glucose values return back to below normal in non diabetics in about 2 hours whereas blood glucose in diabetics rises too much and levels fall back to control only after 4-6 hours. 