Diabetic Kidney Disease: The 2 Lab Tests That Catch Damage 10 Years Early

Diabetes Complications · 4 · February 27, 2026

Forty percent of people with diabetes develop kidney disease. It is completely painless until you have lost 70–80% of kidney function. By then, dialysis is on the horizon. Two simple lab tests — costing about $30 combined — catch the damage 5–10 years before symptoms appear. Most diabetics never get them.

The Two Tests

Urine Albumin-to-Creatinine Ratio (UACR): Detects protein leaking into your urine — a sign that kidney filters are damaged. Normal: below 30 mg/g. Between 30–300: early damage. Above 300: significant damage. This test catches kidney disease years before you feel anything.

Estimated Glomerular Filtration Rate (eGFR): Calculated from a blood creatinine test. Measures how well kidneys are filtering. Above 90: normal. 60–89: mild reduction. 30–59: moderate (Stage 3 — usually the first time a patient hears about their kidneys). Below 15: kidney failure.

Every person with diabetes should have both tests annually. If your doctor is not ordering them, ask. That single question could save you from dialysis.

What Protects Kidneys

Blood pressure control is number one. ACE inhibitors or ARBs are first-choice because they specifically reduce pressure inside kidney filtration units. SGLT2 inhibitors (empagliflozin, dapagliflozin) are game-changers — the CREDENCE trial showed canagliflozin reduced kidney failure risk by 32%. Now standard of care for any diabetic with eGFR above 20 and UACR above 200.

Finerenone (Kerendia) is the newest addition — reduced kidney disease progression by 23% in the FIDELIO trial. Typically added on top of ACE/ARB and SGLT2 for patients with persistent albuminuria.

Track your medications — including kidney-protective drugs — at Medication Tracker. The dashboard integrates all your lab values, so kidney function trends sit alongside glucose and HbA1c data.