Citric acid urine test measures the level of citric acid in urine.
Urine - citric acid test; Renal tubular acidosis - citric acid test; Kidney stones - citric acid test; Urolithiasis - citric acid test
You will need to collect your urine at home over 24 hours. Your health care provider will tell you how to do this. Follow instructions exactly so that the results are accurate.
No special preparation is necessary for this test. But the results are affected by your diet, and this test is usually done while you are on a normal diet. Ask your provider for more information.
The test involves only normal urination, and there is no discomfort.
The test is used to diagnose renal tubular acidosis and evaluate kidney stone disease.
The normal range is 320 to 1,240 mg per 24 hours.
Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples. Talk to your provider about the meaning of your specific test results.
A low level of citric acid may mean renal tubular acidosis and a tendency to form calcium kidney stones.
The following may decrease urine citric acid levels:
- Long-term (chronic) kidney failure
- Excessive muscle activity
- Medicines called angiotensin converting enzyme (ACE) inhibitors
- Parathyroid glands do not produce enough of its hormone (hypoparathyroidism)
- Too much acid in the body fluids (acidosis)
The following may increase urine citric acid levels:
There are no risks with this test.
Pearle MS, Antonelli JA, Lotan Y. Urinary lithiasis: etiology, epidemiology, and pathogenesis. In: Wein AJ, Kavoussi LR, Partin AW, Peters CA, eds. Campbell-Walsh Urology. 11th ed. Philadelphia, PA: Elsevier; 2016:chap 51.
Sreedharan R, Avner ED. Renal tubular acidosis. In: Kliegman RM, Stanton BF, St. Geme JW, Schor NF, eds. Nelson Textbook of Pediatrics. 20th ed. Philadelphia, PA: Elsevier; 2016:chap 529.