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🧪 What is Urine Sugar (Fasting)?

The Urine Sugar (Fasting) test detects the presence of glucose in a urine sample collected after fasting, usually overnight. Normally, urine does not contain glucose as the kidneys reabsorb it completely at normal blood glucose levels.

❓ Why is the Test Done?

To:

Screen for diabetes mellitus or impaired glucose metabolism
Monitor glycemic control in known diabetics
Detect renal glycosuria or other tubular disorders
Evaluate causes of polyuria and polydipsia

📊 Normal Range / Interpretation

Result	Interpretation
Negative	No glucose detected; normal
Positive	Presence of glucose; suggests hyperglycemia or renal glycosuria

📈 Interpretation of Results

Urine Sugar Result	Clinical Significance
Negative	Normal renal glucose reabsorption
Positive	Indicates hyperglycemia (blood glucose usually >180 mg/dL) or renal tubular dysfunction

🧠 Associated Conditions

Condition	Details
Diabetes mellitus	Elevated blood glucose leads to glucose spilling into urine
Renal glycosuria	Tubular reabsorption defect causing glucose in urine despite normal blood glucose
Pregnancy	Increased renal threshold may cause mild glycosuria

🔄 Related / Follow-Up Tests

Fasting blood glucose
HbA1c (glycated hemoglobin)
Oral glucose tolerance test (OGTT)
Renal function tests

✅ Fasting Required?

Test	Fasting Required
Urine Sugar (Fasting)	✅ Yes (sample collected after fasting)

📝 Summary Table

Parameter	Details
What	Detects glucose in urine after fasting
Why	Screen for diabetes and renal tubular disorders
Normal Result	Negative (no glucose in urine)
Positive Result	Indicates hyperglycemia or renal glycosuria
Associated Conditions	Diabetes mellitus, renal glycosuria
Follow-up Tests	Blood glucose, HbA1c, OGTT
Fasting Required	✅ Yes

Urine Sugar (Fasting)

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