What it is (overview)

The Urine Albumin – Quantitative test is a laboratory urine test that measures the exact amount of albumin (a common blood protein) that is leaking into your urine. Healthy kidneys act like fine filters—keeping albumin in the bloodstream while removing waste and extra fluid into the urine. When the kidney’s filtering units (glomeruli) are irritated or damaged, urinary albumin can rise.

This is a quantitative testing method, meaning it reports an actual number (for example, mg/L or mg/24 hours, depending on how the sample is collected). In plain language:

Lower or “negative/normal” albumin usually suggests your kidneys are filtering properly. Higher urine albumin can be an early sign of kidney stress or kidney disease (renal disease), even before you feel symptoms. Mild increases may be called microalbuminuria (often referred to as “moderately increased albumin”), while larger increases can indicate more significant kidney damage and may be called macroalbuminuria (also called “severely increased albumin”).

Because urine concentration can vary with hydration, many clinicians also interpret urine albumin together with urine creatinine (as an albumin-to-creatinine ratio, ACR) for a more stable assessment of kidney function. Your provider will explain which measurement is most appropriate for your situation.

When & why it's usually done

Doctors most often order a Urine Albumin – Quantitative test to check for early kidney damage and to monitor known kidney conditions over time. It is especially important for people at higher risk of kidney disease because albumin can rise early—sometimes years before a noticeable drop in overall kidney function.

This test is commonly done for:

Routine screening and ongoing monitoring in people with:

• Diabetes (type 1 or type 2): high blood sugar can damage kidney filters over time, so regular urinary albumin testing is a key part of diabetes care.

• Hypertension (high blood pressure): elevated pressure can injure kidney blood vessels and cause protein leakage.

Evaluation of symptoms or findings that may suggest kidney problems, such as:

• Swelling of the ankles, feet, hands, or around the eyes (fluid retention)

• Foamy or bubbly urine (can be a sign of higher protein levels)

• Unexplained weight gain from fluid, or decreased urine output

• Abnormal results on other tests (e.g., reduced eGFR/creatinine changes, or protein detected on a urine dipstick)

Assessment of kidney and cardiovascular risk: Persistent albumin in the urine is not only a kidney marker—it can also signal higher risk of heart and blood vessel disease. Measuring urine albumin supports a more complete health assessment for people with metabolic syndrome, obesity, or a family history of kidney disease.

Monitoring response to treatment: If you’re taking medicines that protect the kidneys (such as ACE inhibitors or ARBs) or making lifestyle changes (blood pressure control, glucose control), repeated quantitative urine albumin testing can show whether protein levels in the urine are improving.

Common diseases related to it

• Diabetic kidney disease (diabetic nephropathy)
• Hypertensive kidney disease (nephrosclerosis)
• Chronic kidney disease (CKD)
• Glomerulonephritis (inflammation of the kidney filters)
• Nephrotic syndrome (high urine protein with swelling and low blood albumin)
• Acute kidney injury (AKI), in some cases
• Preeclampsia (pregnancy-related high blood pressure and protein in urine)
• Kidney damage related to autoimmune disease (e.g., lupus nephritis)
• Kidney involvement from infections or systemic inflammation (case-dependent)

Health goals where it may help

• Early detection and monitoring of kidney function changes before symptoms appear
• Diabetes management: tracking long-term complications and improving glucose-related kidney outcomes
• Blood pressure control: assessing kidney impact of hypertension and treatment effectiveness
• Renal disease risk reduction: identifying people who may benefit from kidney-protective medications and lifestyle changes
• Cardiovascular health monitoring: using urinary albumin as a marker linked with higher heart and vascular risk
• General wellness and preventive screening for high-risk individuals (family history of kidney disease, obesity, metabolic syndrome)
• Medication monitoring for therapies that affect kidneys or protein leakage (as directed by a clinician)