Taurine, urine

This test measures the amount of taurine in your urine. Taurine is an amino sulfonic acid that your body makes from other sulfur-containing amino acids and also gets from foods and some supplements. It plays roles in bile acid conjugation, cell volume regulation, and antioxidant defenses.

Urine testing helps show how your kidneys handle taurine and can reflect recent intake from diet or supplements. It is often performed as part of a quantitative urine amino acid profile or to monitor specific clinical situations where taurine balance may be affected.

Doctors may order urine taurine to help evaluate nutrition, to look for patterns of amino acid losses from the kidney, or to monitor the effect of supplements and certain therapies. In children, it may be used with other tests to assess for rare metabolic or transport disorders. In adults, it can provide context when investigating kidney tubular function or when interpreting a broader amino acid profile.

Abnormal results can be associated with high supplemental intake, certain medications, changes in kidney handling, or underlying metabolic conditions. The test can guide next steps such as adjusting supplements, reviewing medications, or pairing with blood amino acid testing if needed.

Your result is interpreted alongside how the sample was collected, your age, kidney function, diet, and any supplements or medications. A higher-than-expected urine taurine result can occur with recent taurine-containing supplements or energy drinks, high dietary intake of animal-based foods, or increased urinary losses due to kidney tubular effects. A lower-than-expected result can be seen with low intake, impaired synthesis from precursor amino acids, or very dilute urine.

If your value is not within the expected range, your clinician may review your diet and supplements, check for medications that affect amino acid handling, and consider repeating the test with a first-morning or timed collection. Sometimes a blood amino acid profile or kidney and liver assessments are recommended to put the finding into context. Do not start or stop supplements without discussing the plan with your healthcare provider.