[3] Postprandial glucose[edit] Main article: Postprandial glucose test A level of < 7.8 mmol/l (140 mg/dl) 90 minutes after a meal is normal. So talk to your doctor about postprandial blood sugar test. Normally, blood glucose levels increase slightly after eating. How can a high-​carb diet lower your blood sugar? Recommended blood glucose levels have a degree of interpretation for every individual and you should discuss this with your healthcare team. 7 mmol/l (126 mg/dl) and above means a risk of diabetes. Time of Check Goal plasma blood glucose ranges for people without diabetes Goal plasma blood glucose ranges for people with diabetes Before breakfast (fasting) < 100 70 - 130 Before lunch, supper and snack < 110 70 - 130 Two hours after meals < 140 < 180 Bedtime < 120 90- 150 A1C (also called glycosylated hemoglobin A1c, HbA1c or glycohemoglobin A1c) < 6% < 7% < = less than > = greater than > = greater than or equal to < = less than or equal to Information obtained from Joslin Diabetes Center's Guidelines for Pharmacological Management of Type 2 Diabetes. [1] There are several different kinds of glucose tests: Fasting blood sugar (FBS), fasting plasma glucose (FPG): 8 or 12 or 14 hours after eating Glucose tolerance test:[2] continuous testing Postprandial glucose test (PC): 2 hours after eating Random glucose test Reference ranges[edit] Fasting blood sugar[edit] A range of 4 to 5.5 mmol/l (70 to 99 mg/dl) before a meal is normal. Experts vary on what the number should be, but the ADA says a general goal is a blood sugar level under 180 mg/dL, 1 to 2 hours after a meal. 140 mg/dl (7.8 mmol/L) after meals You can read in detail about the research that establishes this as the highest level you should allow your blood sugars to rise after meals here: Research Connecting Blood Sugar Level with Organ Damage The AACE Recommends A Post-Meal Blood Sugar Target Below 140 mg/dl In 2007, The American Association of Clinical Endocrinologists, an organization of specialists who treat diabetes, published a White Paper recommending that blood sugar should not be allowed to rise above 140 mg/dl two hours after a meal. With type 1 diabetes, the pancreas no longer makes insulin, so blood glucose is very high (hyperglycemia) and cannot get into the cells that need fuel. Most patients with acute myocardial infarction have high 2-hour plasma glucose levels but normal fasting plasma glucose values. Blood sugar is a term used to refer to blood glucose—a measure of how much glucose is present in the blood. Define preprandial. [1] Patients are instructed not to consume anything but water during the fasting period. In the UK and Canada, the most common unit for measuring blood glucose is millimol per litre (mmol/L). You may or may not understand how your A1C correlates with your target ranges. The blood sugar level, blood sugar concentration, or blood glucose level is the concentration of glucose present in the blood of humans and other animals. Most devices show the results in mg/dl as well as mmol/l. Normal A1c blood sugar test is 4-6 percent. If you are in the USA, look at the big numbers, most everyone else look at the small numbers. Postprandial blood glucose, on the other hand, refers to your blood sugar levels one to two hours after eating. This can be used with other measurements to see how fast your body is using the glucose in your system. 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