Copper 24 Hour Urine Test (24-hour urinary copper) Biomarker Testing
It measures how much copper you excrete in urine over 24 hours to assess copper handling, with convenient ordering through Vitals Vault’s Quest network.
From $164.79 · Quest Diagnostics
- No subscription
- HSA/FSA eligible
- Most results in 3–5 business days
A Copper 24 Hour Urine test measures how much copper your body eliminates in urine over a full day. Because copper is handled by your liver and excreted into bile, changes in urinary copper can be a useful clue when copper metabolism is disrupted.
This test is most often used when you and your clinician are evaluating conditions like Wilson disease (a genetic disorder of copper handling), unexplained liver inflammation, certain neurologic symptoms, or possible excess copper exposure. It can also be used to monitor treatment that is meant to remove copper from the body.
Since it is a timed collection, the quality of the result depends heavily on collecting all urine for the full 24 hours. A “normal” number is only meaningful if the collection is complete and interpreted alongside related labs.
Do I need a Copper 24 Hour Urine test?
You may benefit from a Copper 24 Hour Urine test if your clinician is trying to answer a specific question: are you excreting an unusually high amount of copper, and does that pattern fit with a disorder of copper metabolism or liver function?
This test is commonly considered when you have unexplained abnormal liver enzymes, hepatitis-like symptoms without a clear cause, jaundice, or signs of chronic liver disease. It can also be part of a workup for neurologic or psychiatric changes that raise concern for Wilson disease, especially when paired with blood copper and ceruloplasmin.
It can also be helpful if there is concern about copper exposure (for example, from contaminated water or occupational sources) or if you are already being treated for copper overload and need to see whether therapy is increasing copper excretion.
Your result should support clinician-directed care, not self-diagnosis. Interpretation usually depends on your symptoms, liver tests, and companion copper studies rather than a single urine number.
This is a CLIA laboratory test; results are not diagnostic on their own and should be interpreted with your clinician in the context of other copper and liver studies.
Order labs to measure Copper (24-Hour Urine Collection)
from $164.79 at Quest Diagnostics.
Get this test with Vitals Vault
Vitals Vault lets you order a Copper 24 Hour Urine test directly and complete collection and drop-off through a national lab network. You get a clear lab report, and you can use PocketMD to talk through what your result may mean and what follow-up questions to bring to your clinician.
Because urinary copper is sensitive to collection quality and to other health factors, it often helps to plan companion testing up front (such as ceruloplasmin, serum copper, and liver enzymes) or to schedule a repeat if the collection was incomplete. PocketMD can help you decide whether a retest window makes sense and what additional labs could add context.
If you are monitoring treatment for copper overload, Vitals Vault makes it straightforward to reorder the same test so you can compare trends over time using the same collection method.
- Order online and complete testing through a national lab network
- PocketMD helps you interpret results and plan sensible next steps
- Easy reordering for trend tracking when monitoring treatment
Key benefits of Copper 24 Hour Urine testing
- 01Measures total copper excretion over a full day, which can be more informative than a single spot urine.
- 02Supports evaluation for Wilson disease when interpreted with ceruloplasmin, serum copper, and clinical findings.
- 03Helps distinguish copper-handling problems from look-alike causes of abnormal liver enzymes.
- 04Can monitor response to chelation or zinc-based therapy by showing changes in copper excretion over time.
- 05Provides a concrete data point when copper exposure is suspected and you need an objective baseline.
- 06Highlights collection issues (too low or inconsistent volume) that may prompt a repeat for accuracy.
- 07Pairs well with PocketMD guidance so you can understand next-step testing and retest timing.
What is Copper 24 Hour Urine?
Copper is an essential trace mineral that helps with energy production, connective tissue formation, and nervous system function. Your body tightly regulates copper because both deficiency and excess can cause problems.
A Copper 24 Hour Urine test measures the total amount of copper you excrete in urine over a 24-hour period. In many copper disorders, the key issue is not how much copper you eat, but how your liver processes copper and how copper is transported in the blood.
In Wilson disease, for example, copper is not properly incorporated into ceruloplasmin (a copper-carrying protein) and is not excreted normally into bile. Copper can build up in the liver and other tissues, and urinary copper excretion often rises. The urine test is therefore used as one piece of evidence, not as a standalone answer.
Why a 24-hour collection matters
Copper excretion can vary throughout the day. A 24-hour collection smooths out that variability and reduces the chance that timing, hydration, or a single unusual void will skew the result.
How this differs from blood copper
Blood copper reflects copper bound to proteins (especially ceruloplasmin) plus a smaller “free” fraction. Urine copper reflects what your kidneys are eliminating. Looking at both can help your clinician understand whether a low or high blood copper level is due to protein binding, inflammation, liver function, or true copper excess.
What do my Copper 24 Hour Urine results mean?
Low
Low copper excretion
Low urinary copper can happen when your dietary copper intake is low, when absorption is reduced, or when the 24-hour collection was incomplete. It can also be seen in some patterns of copper deficiency, but urine testing alone is not the best way to diagnose deficiency. If your result is unexpectedly low, your clinician may focus first on collection accuracy and then consider blood copper, ceruloplasmin, and your overall nutrition and gastrointestinal history.
Optimal
In-range copper excretion
An in-range result suggests that your copper excretion over the day is not elevated for the lab’s reference interval. That can be reassuring, but it does not automatically rule out every copper-related condition, especially if other findings are strongly suggestive. If the clinical question is Wilson disease or unexplained liver injury, your clinician will usually interpret this alongside ceruloplasmin, serum copper, liver enzymes, and sometimes imaging or specialist evaluation.
High
High copper excretion
High urinary copper means you are excreting more copper than expected over 24 hours. This can be seen in Wilson disease, in some other liver diseases that disrupt copper handling, and during treatment intended to increase copper removal (such as chelation). Because several conditions can raise urinary copper, the next step is usually to confirm the pattern with companion tests and to review medications and supplements that could affect copper levels.
Factors that influence urinary copper
A complete 24-hour collection is the biggest factor: missing urine or collecting for the wrong time window can falsely lower or distort the result. Liver inflammation, cholestasis (reduced bile flow), and other hepatic conditions can raise urinary copper even without Wilson disease. Supplements or multivitamins containing copper, recent chelation therapy, and high environmental exposure can also increase excretion. Hydration changes urine concentration, which is why total 24-hour amount (not just concentration) and total volume are important context.
What’s included
- Copper, 24 Hour Urine
Similar tests and related topics
Frequently Asked Questions
How do you do a 24-hour urine collection for copper?
You collect all urine for a full 24 hours in the provided container. Typically you discard the first urine of the morning, note the start time, then collect every void for the next 24 hours including the first urine the following morning. Keep the container stored as instructed (often refrigerated) and return it promptly. If you miss a collection, tell the lab or your clinician because the result may not be reliable.
Do I need to fast for a Copper 24 Hour Urine test?
Fasting is usually not required for a 24-hour urine copper test because it measures total daily excretion. However, your clinician may ask you to avoid certain supplements (especially copper-containing products) before and during the collection. Follow the instructions that come with your kit and any clinician guidance.
What is a normal range for 24-hour urine copper?
Reference ranges vary by lab method and units, so the best “normal” range is the one printed on your report. Interpretation also depends on whether the test is being used for screening, diagnosis support, or treatment monitoring. If your value is near a cutoff, your clinician may repeat the test or add companion labs rather than relying on a single result.
Is high urine copper always Wilson disease?
No. Wilson disease is an important cause of elevated urinary copper, but other liver conditions can also increase copper excretion. Treatment with chelating agents can intentionally raise urinary copper as copper is being removed. That is why clinicians usually interpret urine copper together with ceruloplasmin, serum copper, liver enzymes, and your clinical picture.
What other tests are usually checked with a 24-hour urine copper test?
Common companion tests include ceruloplasmin, serum copper, liver enzymes (ALT, AST, alkaline phosphatase), bilirubin, and sometimes a complete blood count. Depending on the concern, your clinician may also consider zinc levels, iron studies, or additional liver evaluation. The goal is to understand whether the urine finding fits a broader pattern.
When should you repeat a 24-hour urine copper test?
A repeat may be appropriate if the collection was incomplete, the timing was off, or the result does not match your symptoms and other labs. For treatment monitoring, repeat timing depends on the therapy plan and how quickly changes are expected, often on the order of weeks to months. Your clinician can help set a schedule that makes the trend meaningful.