My fathers age is 59 years old, his Hba1c reports shows he is pre diabetic stage, we are testing FBS each week or the next week. Following are the results of FBS. 01/06/2021 - FBS 121 mg/dL 13/06/2021 - FBS 116 mg/dL 20/06/2021 - FBS 117 mg/dL 04/07/2021 - FBS 126 mg/dL 11/07/2021 - FBS 127 mg/dL & PPBS 122 mg/dL 18/07/2021 - FBS 115 mg/dL 31/07/2021 - FBS 124 mg/dL 09/08/2021 - FBS 101 mg/dL I want to ask that he is not on any diabetic medication or any other medications, going with diet and some moderate walks to decrease sugar levels. But suddenly it decreased to 101 mg/dL is it a cause for concern?. Whether he is diabetic?. Or it is normal?