Ceruloplasmin

Other names: Caeruloplasmin

check icon Optimal Result: 16 - 31 mg/dL, or 0.16 - 0.31 g/L.

What is Ceruloplasmin?

Ceruloplasmin is a copper-containing enzyme that plays a role in the body's iron metabolism. This test measures the amount of ceruloplasmin in the blood.

Function of copper:

Copper is an essential mineral that plays a role in the regulation of iron metabolism, formation of connective tissue, energy production at the cellular level, and the function of the nervous system. It is absorbed from food and liquids by the intestines and then transported to the liver, where it is stored or used to produce a variety of enzymes.

The liver binds copper to a protein to produce ceruloplasmin and then releases it into the bloodstream. About 95% of the copper in the blood is bound to ceruloplasmin. Because of this, the ceruloplasmin test can be used along with one or more copper tests to help diagnose Wilson disease, an inherited disorder that can lead to excess storage of copper in the liver, brain, and other organs.

When To Get Tested?

When you have jaundice, fatigue, abdominal pain, behavioral changes, tremors, or other symptoms that a health practitioner thinks may be due to Wilson disease or, rarely, to copper deficiency; at intervals when monitoring is recommended.

Test results:

Test results may vary depending on your age, gender, health history, the method used for the test, and other things. Your test results may not mean you have a problem. Ask your healthcare provider what your test results mean for you. 

The normal range for a ceruloplasmin serum test is 19 to 39 milligrams per deciliter (mg/dL).

References:

  • Diagnostic Value of Ceruloplasmin in the Diagnosis of Pediatric Wilson's Disease, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4600703/
  • Ceruloplasmin and iron in Alzheimer’s disease and Parkinson’s disease: a synopsis of recent studies, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3493298/

What does it mean if your Ceruloplasmin result is too high?

Your ceruloplasmin level can be higher than normal because of pregnancy, estrogen therapy, and birth control pills. Diseases such as leukemia, Hodgkin lymphoma, primary biliary cirrhosis, and rheumatoid arthritis can also cause a higher ceruloplasmin level. 

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What does it mean if your Ceruloplasmin result is too low?

Low Ceruloplasmin Levels: What It Means and Possible Causes

Ceruloplasmin is a copper-binding protein produced by the liver, playing a crucial role in copper transport, iron metabolism, and antioxidant defense. A low or slightly decreased ceruloplasmin level may indicate issues with copper metabolism, liver function, inflammation, or certain genetic conditions.


What Causes Low or Slightly Low Ceruloplasmin Levels?

1. Wilson’s Disease (Copper Overload Disorder)

  • A genetic condition where copper accumulates in the liver, brain, and other organs instead of being properly excreted.
  • Characterized by low ceruloplasmin, low serum copper, and high free (unbound) copper levels.
  • Symptoms may include liver dysfunction, neurological issues (tremors, speech difficulties), psychiatric symptoms, and Kayser-Fleischer rings in the eyes.

2. Copper Deficiency

  • Low ceruloplasmin can be linked to low copper levels due to:
    • Malabsorption disorders (e.g., celiac disease, Crohn’s disease, gastric bypass surgery).
    • Excess zinc intake, which interferes with copper absorption.
    • Inadequate dietary intake or prolonged IV nutrition without copper supplementation.
  • Symptoms of copper deficiency include anemia, fatigue, weakened immunity, neurological issues, and brittle hair.

3. Liver Disease

  • Since ceruloplasmin is produced by the liver, chronic liver disease, cirrhosis, or hepatitis may result in low levels.
  • Individuals with advanced liver dysfunction may experience jaundice, swelling, and fatigue.
  • Mild ceruloplasmin reductions may occur with early-stage liver dysfunction (e.g., fatty liver disease).

4. Menkes Disease (Rare Genetic Disorder)

  • A severe copper transport disorder caused by ATP7A gene mutations, leading to copper deficiency despite normal dietary intake.
  • Symptoms appear in infancy and include failure to thrive, brittle hair, neurological impairment, and seizures.

5. Nephrotic Syndrome (Protein Loss Through Urine)

  • Excessive loss of ceruloplasmin through the kidneys due to protein-wasting conditions like nephrotic syndrome.
  • Symptoms include severe swelling (edema), proteinuria, and high cholesterol levels.

6. Chronic Inflammation or Oxidative Stress

  • Ceruloplasmin is an acute-phase protein, meaning its levels can fluctuate with inflammatory states.
  • Chronic, low-grade inflammation, as seen in autoimmune diseases or metabolic syndrome, may lead to a slight decrease in ceruloplasmin.

7. Hormonal or Metabolic Factors

  • Estrogen increases ceruloplasmin production, so men and postmenopausal women naturally have lower levels than premenopausal women.
  • Hormonal fluctuations may cause mild ceruloplasmin reductions.

8. Genetic Variability

  • Some individuals naturally have lower baseline ceruloplasmin levels due to genetic variations, without significant health concerns.

Is a Slightly Low Ceruloplasmin Level a Concern?

  • If serum copper and urine copper levels are normal, a mild ceruloplasmin reduction may not be clinically significant.
  • However, if accompanied by neurological symptoms, fatigue, or abnormal liver function tests, further investigation is recommended.

Next Steps If Ceruloplasmin Is Low or Slightly Low

  • Check serum copper levels – Low levels may indicate copper deficiency, while high free copper suggests Wilson’s disease.
  • Evaluate 24-hour urine copper – Helps distinguish between copper overload (Wilson’s disease) and copper deficiency.
  • Assess liver function tests (LFTs) – To rule out liver disease.
  • Monitor zinc intake – High zinc levels can suppress copper absorption and lower ceruloplasmin.
  • Consider dietary changes – Increasing copper-rich foods (shellfish, nuts, seeds, dark chocolate, whole grains) may help.

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