Coenzyme Q10 (CoQ10)
Measures CoQ10 levels in blood to assess cellular energy production, antioxidant status, and potential deficiency from medications like statins.
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Lab testing services linked from this site are not available to residents of Alaska, Arizona, or Hawaii, unless otherwise noted on the lab's own website.
This publication is not intended to solicit the purchase of laboratory testing from any individual consumer.
What this test measures
Coenzyme Q10 (CoQ10) is a naturally occurring compound found in every cell in the body, with particularly high concentrations in the heart, liver, kidneys, and pancreas. Its primary function is serving as a critical component of the mitochondrial electron transport chain, the molecular machinery that produces adenosine triphosphate (ATP), the cell's main energy currency. CoQ10 also functions as a potent fat-soluble antioxidant, protecting cell membranes and circulating lipoproteins from oxidative damage.
In the bloodstream, CoQ10 is carried by lipoproteins, with approximately 60% associated with LDL, 25% with HDL, and 15% with other lipoprotein fractions. Levels naturally decline with age, and individuals taking statin medications, which reduce cholesterol by inhibiting the same metabolic pathway that produces CoQ10, may experience further depletion. This test measures blood CoQ10 concentration to assess cellular energy production capacity and antioxidant status, particularly in individuals with cardiovascular concerns, unexplained fatigue, or statin-related muscle symptoms.
Who should consider this test
You might consider this test if you are experiencing any of the following:
- Individuals taking statin medications should consider this test, as statins can significantly reduce CoQ10 levels in a dose-related manner, and this depletion may contribute to statin-induced muscle symptoms.
- Those experiencing chronic fatigue, muscle weakness, or memory problems may benefit from testing, as low CoQ10 levels are associated with chronic fatigue syndrome and can contribute to concentration difficulties.
- People with cardiovascular conditions, diabetes, or neurodegenerative diseases such as Parkinson's or Alzheimer's disease should consider testing, as CoQ10 has been implicated in these conditions and may play a role in treatment monitoring.
- Individuals with type 2 diabetes may have reduced CoQ10 levels, with some studies showing 45% lower levels compared to healthy individuals.
- Those with migraines or neurodegenerative conditions may benefit from testing, as CoQ10 deficiency has been found in patients with migraines and the test may be used to monitor treatment of various neurological conditions.
What to expect
Preparation
No fasting is required for this test. Patients should avoid taking CoQ10 supplements on the morning of the test to ensure accurate baseline results. Continue all prescribed medications as usual unless advised otherwise by a healthcare provider.
Sample Type
A standard blood draw will be performed from a vein in the arm, similar to routine blood work. The blood sample will be collected in a special serum tube.
Collection
The laboratory technician will collect and label the sample according to standard protocols, gently inverting the tube 5 times immediately after draw without shaking, allowing blood to clot for 30 minutes, then centrifuging for 10 minutes.
Turnaround
Results are typically available within 4-6 days from the date of specimen collection, though some laboratories may take up to 7 days depending on testing schedules and potential delays.
Understanding your results
Normal blood CoQ10 levels generally fall between 0.4 and 1.9 mg/L, though reference ranges may vary by laboratory. It is important to note that blood levels may not perfectly reflect CoQ10 concentrations in tissues like muscle and heart, since the body can maintain circulating levels while tissue stores are depleted. Healthcare providers interpret results alongside medication use (particularly statins), cardiac history, energy-related symptoms, and lipid levels to determine whether supplementation or further evaluation may be appropriate.
| Population | Reference Range | Notes |
|---|---|---|
| Adults | 0.4-1.9 mg/L (or μg/mL) | Normal range may vary between laboratories and can be influenced by age and individual factors |
Reference ranges may vary by laboratory and individual factors. Results should be interpreted by a healthcare provider in the context of your overall health.
What does a “Low” result mean?
Low CoQ10 levels may be associated with various conditions including sepsis, cancer, HIV/AIDS, and hyperthyroidism. Mild deficiency typically results in fatigue and muscle weakness, while severe deficiencies, usually caused by genetic mutations, can lead to more serious neurological symptoms. Clinical phenotypes of CoQ10 deficiency include encephalomyopathy, cerebellar ataxia, multisystemic infant disease, nephropathy, and isolated myopathy, and may be relevant to statin-induced muscle symptoms.
What does a “High” result mean?
Abnormally high levels of CoQ10 are typically only seen with supplement use, and it is unclear whether moderately excessive amounts are harmful to humans. Since CoQ10 is fat-soluble but does not accumulate after supplementation stops, elevated levels usually indicate recent supplement intake rather than a health concern.
Privacy & confidentiality
Your CoQ10 test results are completely confidential and protected by HIPAA regulations. Results are not shared with insurance companies, will not appear on insurance statements, and are not added to your medical record unless you choose to share them with your healthcare provider. No doctor visit required to order this test.
Frequently asked questions
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Last reviewed: April 2026
CPT Code: 82542
This test may not be available in: NY, NJ, RI
This page is for informational purposes only and does not constitute medical advice. Always consult with a healthcare provider regarding any health concerns. LevelPanel does not diagnose, treat, or prescribe.
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LevelPanel has no business or affiliate relationship with Quest or LabCorp. These links are provided as a public service.
Lab testing services linked from this site are not available to residents of Alaska, Arizona, or Hawaii, unless otherwise noted on the lab's own website.
This publication is not intended to solicit the purchase of laboratory testing from any individual consumer.
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