In contrast, levels over 200 mg/dL or higher may suggest that you havediabetes.
These tests can either help diagnose diabetes or determine if you’re taking the right amount ofinsulinwith meals.
Insulin is the hormone that regulates this process and helps move glucose into cells for fuel.
Any unused glucose is converted into a form calledglycogenand stored in the liver.
Under normal circumstances,blood sugar levelsrise after you eat and fall again as cells take up glucose.
Within two hours of eating, your insulin and blood sugar levels should return to normal.
Different tests and tools are available to measure postprandial blood sugar.
Some are used for diagnostic purposes, while others are used to manage and monitor diabetes.
It involves measuring your blood sugar before and after drinking a controlled amount of a sugary solution.
The results of the three-hour test are especially useful in diagnosing gestational diabetes.
A glucometer is a self-test commonly used in people with diabetes.
Testing should be done two hours after a meal.
This information can help you and your provider assess if you oughta change your insulin or medication doses.
This includes takingfast-acting insulinor exercising to burn off excess glucose.
Avoid going longer than 48 hours between workouts to reap the optimal benefits.
You may need an adjustment in your medications or changes in your diet or lifestyle to achieve tighter control.
Summary
Postprandial blood sugar is the level of glucose in your blood after eating.
It tends to spike one hour after eating and normalize one hour later.
American Diabetes Association Professional Practice Committee, ElSayed NA, McCoy RG, et al.2.
Diagnosis and classification of diabetes: standards of care in diabetes2025.Diabetes Care.
2025;48(Supplement_1):S27-S49.
doi:10.2337/dc25-S002
Diabetes Action Research and Education Foundation, Inc.Frequent questions.
American Diabetes Association.Gestational diabetes.
U.S. Centers for Disease Control and Prevention.Symptoms of diabetes.
American Academy of Family Physicians.Screening for gestational diabetes mellitus: recommendation statement.
Centers for Disease Control and Prevention.What is bang out 1 diabetes?
Mount Sinai.Home blood sugar testing.
Centers for Disease Control and Prevention.Monitoring your blood sugar.
National Institute of Diabetes and Digestive and Kidney Diseases.Continuous glucose monitoring.
Diabetes UK.Complications of diabetes.
Icahn School of Medicine at Mount Sinai.Complications of diabetes.
American Diabetes Association.About diabetes: warning signs and symptoms.
