Quick answer
Kidney function is checked with serum creatinine (normal: men 0.7–1.3, women 0.6–1.1 mg/dL), blood urea nitrogen (7–20 mg/dL), uric acid, electrolytes and a urine routine test. People with diabetes or high blood pressure should test at least yearly.
Tests that check kidney function
| Test | What it shows | Typical normal |
|---|---|---|
| Serum Creatinine | How well kidneys filter waste | M 0.7–1.3, F 0.6–1.1 mg/dL |
| BUN | Urea waste in blood | 7–20 mg/dL |
| Uric Acid | Gout and kidney stone risk | M 3.5–7.2, F 2.5–6.2 mg/dL |
| Electrolytes | Sodium, potassium, chloride balance | Na 135–145, K 3.5–5.1 mmol/L |
| Urine Routine | Protein, blood, infection in urine | Protein: Nil |
Who should test kidney function regularly?
- People with diabetes or high blood pressure
- Adults above 60
- People who take painkillers frequently
- Anyone with a family history of kidney disease or kidney stones
Protecting your kidneys
- Keep blood sugar and blood pressure under control.
- Drink enough water, especially in summer.
- Avoid unnecessary painkillers and unprescribed supplements.
- Limit salt intake.
Frequently asked questions
What is KFT or RFT?
KFT (Kidney Function Test) or RFT (Renal Function Test) is a group of tests — usually creatinine, urea/BUN, uric acid and electrolytes.
Can kidney disease be detected early?
Yes. Protein in the urine and a rising creatinine are early signs that can be picked up before any symptoms appear.
Medical disclaimer: This information is for general awareness only and is not a substitute for professional medical advice. Please consult a qualified doctor to interpret your results and before starting or changing any treatment.