# Citric Acid (Citrate), 24-Hour Urine

> This test measures the amount of citrate in urine collected over a 24-hour period. Citrate is a substance that naturally prevents calcium crystals from clumping together to form kidney stones. This measurement helps show if low citrate levels are increasing your risk for developing stones or contributing to recurrent stone formation. While it helps identify metabolic causes for stones, such as problems with how the kidneys balance acid, it does not locate existing stones or diagnose kidney disease on its own.

- Labcorp code: 016865
- Category: [Bone Health](https://app.picardo.health/labs/tests/bone-health.md)
- Price: shown at checkout, before payment.
- Blood draw: free at a Labcorp location, or $75.00 at home.
- Order link: https://app.picardo.health/labs/order?tests=016865&ref=assistant

## About ordering

A licensed physician reviews every order before any test is run, and results arrive in the person's Picardo account. Ordering is open to adults 18 and over in the US, except New York, New Jersey, Rhode Island, Pennsylvania, Maryland, Massachusetts, Hawaii and Maine. General health information, not medical advice.