Measuring blood glucose (glycemia) 2 hours PC (after a meal) is one of several tests used to monitor diabetes. This test is different from hyperglycemia 2 hours post 75 grams of glucose, which is used to diagnose diabetes. The blood glucose 2 hours PC better reflects fluctuations in glucose levels in the patient’s environment (eating habits, medication-related, etc.) and complements diabetes self-monitoring performed at home with a blood glucose monitor or monitoring in the lab with a measure of glycosylated hemoglobin (HbA1c).
Glycemia, exactly 2 hours after the end of a balanced meal containing sufficient carbohydrates (sugars) but also other elements from each of the major food groups, must be lower than 7.8 millimoles of glucose per litre of blood (mmol/L).
Glucose levels over 7.8 mmol/L (or more rarely below 3.9 mmol/L) may indicate that the diabetes is not being controlled optimally, but these levels must be interpreted along with all elements of the case (diabetes type, treatment type and targets, in-home self-monitoring results, HbA1c level, risk of hypoglycemia, etc.).