: Lead [Mass concentration] in 24-hour urine

: What This Test Measures

: Lead is a toxic metal that can enter the body through contaminated air, water, food, paint, or occupational exposure. This test measures the mass concentration of lead in urine gathered over 24 hours, which reflects how much lead is being eliminated by the kidneys during that period.

: How the Sample Is Collected

: You will be given a container and instructions to collect all urine produced over a complete 24-hour period, typically starting after the first morning void is discarded. Careful, complete collection is important because missed samples can make results unreliable. Follow your lab's handling and storage instructions exactly.

: What the Results Mean

: Results are reported as a mass concentration of lead in the urine. Higher levels may indicate increased lead exposure or body burden, while levels within the expected range suggest limited recent excretion. Your clinician interprets results alongside your symptoms, exposure history, and other tests; specific reference limits vary by laboratory.

: Preparing for the Test

: Tell your healthcare provider about any occupational or environmental lead exposure, medications, and supplements. Avoid contaminating the collection container and wash hands before collecting. Follow any dietary or activity instructions your provider gives, and note that timing and completeness of collection affect accuracy.