Glucose in Serum (24-hour profile)

Why This Test Is Done

Your healthcare provider 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 fatigue or vision changes. It may also be used to monitor treatment effectiveness in people already diagnosed with diabetes or metabolic disorders.

What to Expect Before the Test

No special preparation is needed for this test. You’ll have a small needle inserted into your arm or vein to draw blood. The sample is then processed to measure glucose levels at multiple time points. If you’re taking medications that affect blood sugar, let your provider know.

What the Results Mean

The test provides a detailed profile of your glucose levels throughout the day. Normal results typically show stable blood sugar without extreme spikes or drops. Abnormal results may indicate poor glucose control, which could signal diabetes or other metabolic issues requiring further evaluation.

Common Causes of Abnormal Results

High glucose levels might be due to undiagnosed diabetes, poor diet, stress, or certain medications. Low glucose levels (hypoglycemia) can result from overmedication, fasting too long, or certain medical conditions. Your provider will discuss these findings with you and may recommend lifestyle changes or additional tests.