what should fasting blood sugar be

A normal fasting blood sugar level for a healthy person is typically between 70 and 99 mg/dL (3.9 to 5.4 mmol/L). Levels from 100 to 125 mg/dL indicate prediabetes, and a fasting blood sugar level of 126 mg/dL or higher indicates diabetes. For people with diabetes, fasting blood sugar targets are generally between 80 and 130 mg/dL, with post-meal levels under 180 mg/dL considered acceptable.