Prandial relates to a meal. Postprandial means after eating a meal while preprandial is before a meal.

How long is the postprandial period?

The postprandial state, with respect to glucose, is defined as a 4-h period that immediately follows ingestion of a meal (7). During this period, dietary carbohydrates are progressively hydrolyzed through several sequential enzymatic actions.

What is the normal 2 hour postprandial blood sugar?

Normal results for the two-hour postprandial test based on age are: For those who don't have diabetes: less than 140 mg/dL. For those who have diabetes: less than 180 mg/dL.