Urine Lead Mass Concentration (24-hour collection)

Why This Test Is Done

Your doctor may recommend this test if you have symptoms of lead poisoning (such as fatigue, headaches, or developmental delays in children), if you work in an environment with lead exposure (e.g., construction, battery manufacturing), or if you’ve been exposed to lead through contaminated water, food, or supplements. It can also be used to monitor lead levels in people receiving certain treatments, like chelation therapy.

What to Expect Before the Test

You’ll need to collect all urine for a full 24-hour period, typically starting after midnight on one day and ending just before midnight the next. Follow your healthcare provider’s instructions carefully to ensure accurate results. Drink plenty of water to help flush lead out of your body.

What to Expect During the Test

You’ll provide a single urine sample at the end of the 24-hour period, which will be tested in a lab. No special preparation is needed beyond collecting your urine as directed.

What the Results Mean

Higher-than-normal lead levels in urine may indicate ongoing exposure to lead. Your doctor will interpret the results in the context of your symptoms, medical history, and other tests. Very high levels can cause serious health issues, while low levels may not require immediate action but should be monitored.