Specialized Urine Testing

This test gathers every urine sample you pass over 24 hours. A full day gives a more complete picture than one spot sample. Doctors use it to help diagnose Wilson disease, often with blood tests, an eye exam, and sometimes a liver biopsy. They also use it during treatment, because medicines called chelators (such as penicillamine and trientine) raise the amount of copper you pass in urine. Changes in the result help show whether treatment is working and whether doses are being taken as planned.

Ethyl glucuronide (EtG) is made when the body breaks down alcohol. It is a specific sign that alcohol was used, and a urine test can pick it up for up to 80 hours. Unlike some blood markers such as GGT or MCV, urinary EtG is not affected by cirrhosis. Care teams may use it to support recovery from alcohol-related liver disease.

Medicines, herbal products, and supplements can injure the liver. This is called drug-induced liver injury (DILI). Its symptoms are often vague, and it can progress to liver failure in days. No single test confirms it. Doctors rule out other causes, such as viral hepatitis, and compare the timing of your liver injury with what you took. A urine screen can be one piece of that work.

Learn about the treatments that liver specialists may talk with you about.