Is 157 glucose a normal result if blood test was taken in the middle of the day and no fasting?

Possibly: A fasting (nothing by mouth for 8 hrs) blood sugar level should be <100. 100 - 125 mg/dL is considered prediabetes. If it's >126 mg/dL on two separate tests, you have diabetes. The values for a "normal" random glucose test in an average adult are 79–160 mg/dl Between 160–200 mg/dl is pre-diabetes. > 200 mg/dl is + for diabetes. Midday does not say when last you ate. Get screening to be sure.