Albumin is the main protein in blood plasma. Normally, only trace amounts are present in urine.

Elevated urinary albumin (albuminuria) indicates kidney damage or increased glomerular permeability.

Clinical uses include:

Early detection of diabetic nephropathy.

Monitoring hypertensive patients for kidney involvement.

Assessing progression of chronic kidney disease (CKD).

Evaluating cardiovascular risk, as albuminuria is linked to vascular damage.

Often performed as spot urine albumin, albumin-to-creatinine ratio (ACR), or 24‑hour urine albumin.

Analyte: Albumin in urine (mg/dL or mg/day).

Normal Range (varies by lab):

Normal: <30 mg/day or ACR <30 mg/g.

Microalbuminuria: 30–300 mg/day or ACR 30–300 mg/g.

Macroalbuminuria: >300 mg/day or ACR >300 mg/g.

Abnormal Findings:

Elevated albumin: Suggests kidney damage due to diabetes, hypertension, glomerulonephritis, or other renal disease.

Clinical Use:

Provides a sensitive marker for early kidney dysfunction.

Helps guide diagnosis, monitoring, and treatment of renal and cardiovascular disorders.

Supports nephrology, endocrinology, and internal medicine evaluations