Copper
Copper is an essential trace mineral needed to make red and white blood cells, protect nerves and build connective tissue. Low levels can cause anaemia and nerve problems; high levels can signal inflammation, liver disease or excess intake. Fasting is not required.
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What the Copper test tells you
Copper is a trace mineral the body needs in small but steady amounts. It is part of enzymes that help release iron for making red blood cells, keep white blood cells in normal numbers, protect the coverings of nerves, cross-link collagen in skin and blood vessels, and produce energy inside cells. The body absorbs copper from food in the upper gut, stores it mainly in the liver and removes any excess through bile.
Most of the copper measured in a blood sample is carried by ceruloplasmin, a protein the liver makes. That link explains much of how the test behaves. Anything that raises ceruloplasmin, such as inflammation, pregnancy, the contraceptive pill or hormone therapy, raises serum copper without any true excess, and anything that lowers ceruloplasmin, such as protein loss or severe liver disease, lowers it. Zinc matters too: high-dose zinc supplements block copper absorption in the gut and are one of the most common reasons for a low result.
Doctors usually order the test when an unexplained anaemia or low white cell count does not respond to iron, when there are nerve symptoms such as numbness or unsteady walking, after weight-loss surgery, or with long-term zinc use. It is also part of the work-up for Wilson disease, a rare inherited condition in which copper builds up in the liver and brain; there the blood copper is often low or normal, so it is read with ceruloplasmin and a 24-hour urine copper rather than on its own.
Ordered when copper deficiency or excess is suspected: anaemia or a low white cell count that does not respond to iron, numbness or unsteadiness, long-term zinc supplements, weight-loss surgery, or when Wilson disease is being investigated.
- Anaemia that does not respond to iron
Copper is needed to use iron and make blood cells. Anaemia or a low white cell count that persists despite iron can point to copper deficiency.
- Nerve symptoms
Low copper can damage the spinal cord and nerves, causing numbness and unsteady walking that can look like vitamin B12 deficiency.
- Zinc use and gut surgery
High-dose zinc and weight-loss surgery both reduce copper absorption. Testing checks whether levels have fallen.
- Investigating Wilson disease
Copper is measured with ceruloplasmin when a rare inherited copper build-up is suspected in younger people with liver or nerve symptoms.
Reasons your doctor may request the Copper test
Your doctor may order this test for any of the reasons below. Some are routine checks, others follow specific symptoms or an earlier result.
Anaemia & nerve symptoms
- Anaemia or a low white cell count that does not improve with iron or other usual treatment.
- Numbness, tingling, unsteady walking or other nerve symptoms with no clear cause.
Absorption & supplements
- Long-term use of zinc supplements or zinc-containing denture creams.
- Previous weight-loss surgery, long-standing bowel disease or long-term intravenous feeding.
Wilson disease & monitoring
- Suspected Wilson disease in a young person with liver disease, tremor or behavioural change.
- Monitoring during treatment for a copper disorder or copper replacement.
A result in the Normal band, 70 to 140 µg/dL, is the usual adult finding. Because most blood copper is carried by ceruloplasmin, the figure reflects that protein as much as your copper stores. A result in the Low band, below 70 µg/dL, can come from long-term zinc supplements, weight-loss surgery, malabsorption, protein loss through the kidneys or gut, or, rarely, Wilson disease, where low ceruloplasmin lowers the blood level even though copper is building up in the liver. A result in the High band, above 140 µg/dL, is most often due to oestrogen from the pill or hormone therapy, pregnancy, or infection and inflammation, and less often to liver conditions that block bile flow or to excess intake. Your doctor reads it with ceruloplasmin, zinc, a blood count and liver tests, and repeats it once any illness has settled.
Medically reviewed by Dr Nirupama Sabhapathy
Ranges are a guide: your physician interprets your result alongside your symptoms and history.
What a higher result can point to
- Oestrogen from the combined contraceptive pill or hormone therapy, which raises ceruloplasmin.
- Pregnancy, which raises copper steadily towards the third trimester.
- Infection, inflammation or injury, because ceruloplasmin rises as part of the acute-phase response.
- Liver conditions that reduce bile flow, since bile is the main route for removing copper.
- Excess copper from supplements or contaminated water, or occupational exposure.
What a lower result can point to
- Long-term high-dose zinc supplements, which block copper absorption in the gut.
- Weight-loss surgery or other gut surgery that bypasses where copper is absorbed.
- Malabsorption from coeliac disease, inflammatory bowel disease or chronic diarrhoea.
- Protein loss through the kidneys or gut, which removes ceruloplasmin and the copper it carries.
- Wilson disease, where low ceruloplasmin lowers the blood level even though copper builds up in the liver.
- Long-term intravenous feeding without adequate copper, or severe malnutrition.
These are possibilities, not diagnoses. A single value outside the reference range is interpreted alongside your symptoms, history and other tests: your doctor decides what it means for you.
What this test cannot tell you
- Serum copper mostly reflects ceruloplasmin, so anything that raises or lowers that protein moves the result without a real change in copper stores.
- Inflammation, oestrogen and pregnancy can lift the value into or above the usual range and hide a deficiency.
- A normal result does not rule out Wilson disease, which needs ceruloplasmin, urine copper and specialist assessment.
- It cannot show how much copper is stored in the liver or other tissues.
Risks of the blood draw
- Mild bruising or brief soreness where the needle went in.
- Occasional lightheadedness, which settles after a few minutes of rest.
- Bleeding or infection at the site, which is rare with sterile single-use equipment.
- 1Copper helps make red and white blood cells, protects nerves and strengthens connective tissue.
- 2Most copper in the blood travels bound to ceruloplasmin, a protein made by the liver.
- 3High-dose zinc supplements and weight-loss surgery are common causes of low copper.
- 4Oestrogen, pregnancy and inflammation raise the reading without any true copper excess.
- 5The value guides your doctor alongside ceruloplasmin, zinc and a blood count; it is not a diagnosis on its own.
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Frequently Asked Questions
Everything you need to know about the Copper test. Can't find what you're looking for?
Talk to our team→Our laboratory reports 70 to 140 µg/dL as the normal adult range for serum copper. Below 70 µg/dL is reported as low and above 140 µg/dL as high. Because most blood copper is carried by ceruloplasmin, the figure reflects that protein as much as your copper stores, so your doctor reads it with ceruloplasmin and zinc.
A high result is most often due to oestrogen from the pill or hormone therapy, pregnancy, or infection and inflammation, all of which raise ceruloplasmin without any true copper excess. Less often it reflects liver conditions that block bile flow, since bile is the main route for removing copper, or excess intake from supplements, contaminated water or work exposure.
Common causes are long-term high-dose zinc supplements, which block copper absorption, and weight-loss or other gut surgery that bypasses where copper is absorbed. Malabsorption from coeliac or inflammatory bowel disease, protein loss through the kidneys or gut, long-term intravenous feeding and severe malnutrition can also lower it. Rarely, a low value is the first clue to Wilson disease.
Serum copper is the total copper in the blood, and ceruloplasmin is the liver protein that carries most of it. Because the two usually move together, measuring both helps your doctor tell whether an unusual copper result reflects a real change in copper or simply a change in the carrier protein, and ceruloplasmin is central when Wilson disease is being investigated.
Yes. Ceruloplasmin rises as part of the body's response to infection, inflammation or injury, which lifts serum copper and can even hide an underlying deficiency. If you have been unwell recently, tell the team; your doctor usually repeats the test once the illness has settled before drawing conclusions.
The two compete for absorption in the gut, so long-term high-dose zinc supplements are one of the commonest causes of copper deficiency. Checking both shows whether a supplement or a diet has tipped the balance.
No. In Wilson disease copper builds up in the liver and brain, but the blood level is often low or normal because ceruloplasmin, the protein that carries copper, is reduced. Diagnosis relies on ceruloplasmin, a 24-hour urine copper and specialist assessment.
Yes. Oestrogen raises the liver's output of ceruloplasmin, so the combined pill, hormone therapy and pregnancy all push serum copper up, sometimes above the usual range, without any copper excess. Let us know if any of these apply to you.
Copper deficiency can cause anaemia and a low white cell count that do not respond to iron, and nerve damage that affects balance and sensation in the feet, which can resemble vitamin B12 deficiency. It is seen most often after weight-loss surgery or with heavy zinc use.
No. Fasting is not mandatory, so you can eat and drink normally, although your doctor may ask for a morning sample so repeat results are comparable. Ask your doctor whether to pause copper or zinc supplements beforehand rather than stopping anything on your own.
The copper test is AED 80, including a physician-reviewed report, with results usually within 3 to 4 days. Home collection anywhere in Dubai is free when your order reaches AED 300 or includes a package; below that, a AED 100 home collection fee applies (AED 50 for a lab walk-in).