Oxalate from 24h urine
This test measures the amount of oxalate in the urine over a 24-hour period. Oxalate is a substance produced naturally in the body and absorbed through diet. Increased oxalate excretion can contribute to the formation of calcium oxalate kidney stones, the most common form of kidney stones. In addition, excessive oxalate levels may indicate underlying metabolic disorders, intestinal problems or diet-related stress.
When is this test recommended?
-Recurrent kidney stones - to check whether increased oxalate excretion is contributing to stone formation.
-Suspected hyperoxaluria - to investigate whether the body is making too much oxalate (primary hyperoxaluria) or whether there is excessive absorption from the diet (secondary hyperoxaluria).
-Intestinal problems and malabsorption - in conditions such as celiac disease, IBD (Crohn's disease, ulcerative colitis) or after gastrointestinal surgery, as impaired fat absorption can lead to increased oxalate absorption.
-Unexplained renal insufficiency - if there is no obvious cause and oxalate nephropathy is suspected.
-Nutritional evaluation - to determine if a diet high in oxalate-rich foods (such as spinach, nuts and chocolate) plays a role in symptoms.
How does the test work?
You collect all your urine in a special container for 24 hours, please note we do not provide a urine container. This provides a reliable measurement of total oxalate excretion over an entire day, as oxalate levels can fluctuate. The urine is then analyzed in an ISO-certified laboratory.
What does the result say?
- Normal values: No increased risk of oxalate-related kidney problems.
- Elevated oxalate levels: Possible risk of kidney stones or underlying metabolic problems.
- Low oxalate levels: May indicate low oxalate diet or other metabolic factors.
Additional advice
Increased oxalate excretion may require diet modification, intestinal health analysis or further medical examination. Consult a specialist for interpretation of results and next steps.
