Serum Insulin Concentration Measured Over Multiple Meals (24-Hour Profile)

Why This Test Is Done

Your doctor may order this test if you have symptoms of diabetes (like frequent urination, extreme thirst, or unexplained weight changes), if you have a family history of diabetes, or if you’re experiencing unexplained blood sugar fluctuations. It’s also used to monitor how well insulin therapy is working in people with diabetes.

How the Test Works

You’ll fast overnight before the test. Blood samples are collected at several intervals after eating a standard meal to measure insulin levels at different times. This helps track how your pancreas releases insulin in response to glucose.

What to Expect Before the Test

You’ll need to avoid eating or drinking anything except water for 8–12 hours before the test. Wear comfortable clothing and plan to stay near the testing site for the duration of the meal and blood draws. Your doctor or lab staff will guide you through the process.

What the Results Mean

Results help determine if your body produces enough insulin, if insulin works properly, or if there’s an issue with how your body stores or uses glucose. Abnormal results may indicate conditions like type 1 or type 2 diabetes, prediabetes, or other metabolic disorders.