What is the 24-Hour Urine Albumin Test?

Albumin is a protein normally found in the blood, essential for maintaining fluid balance. Healthy kidneys filter waste while retaining albumin, preventing it from leaking into urine. The presence of albumin in urine (albuminuria) indicates that the kidneys’ filtering units may be damaged, signaling early kidney dysfunction.

A 24-hour urine albumin test collects all urine over a full day to accurately measure the total albumin excreted, providing a comprehensive and reliable assessment of kidney function.

Why is the Test Important?

1. Early detection of kidney damage, especially in people with diabetes or high blood pressure

2. Monitoring progression of chronic kidney disease

3. Evaluating kidney health in autoimmune diseases, infections, or after medication use

5. Guiding treatment decisions to prevent further kidney deterioration

How is the Test Performed?

1. You will collect all urine in a special container over 24 hours, starting after the first morning urination and including the first urination the next day

2. It’s important to avoid missing any urine to ensure accurate results

3. The collected sample is analyzed for albuminconcentration and total volume to calculate daily excretion

4. Results help your healthcare provider assess kidney health and detect microalbuminuria (early damage) or macroalbuminuria (more extensive damage)

What to Expect

The test is non-invasive but requires careful collection adherence. You may receive instructions about diet or medications beforehand. Most patients find the test easy to complete and only need to return the container to their healthcare provider or lab for analysis.