Muscle Disease Blood Test

What is Muscle disease?

Muscle disease is a group of conditions that affect muscle strength, function, and structure, ranging from muscular dystrophy to inflammatory myopathies. It is caused by genetic mutations, autoimmune responses, metabolic disorders, or degenerative processes that damage muscle fibers. The Chromium, Urine test is the most important test for monitoring muscle disease because it measures creatinine levels, which directly indicate muscle breakdown and metabolism.

RECOMMENDED TEST Chromium, Urine
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What causes muscle disease?

Muscle disease is caused by genetic mutations, autoimmune disorders, metabolic abnormalities, or degenerative processes that damage muscle tissue. Conditions like Duchenne muscular dystrophy result from mutations in the dystrophin gene, while polymyositis and dermatomyositis occur when the immune system attacks muscle fibers. Metabolic myopathies develop from enzyme deficiencies that prevent muscles from producing energy properly, and mitochondrial disorders affect the power centers of muscle cells.

What is the best test for muscle disease?

The Chromium, Urine test is the most important blood test for monitoring muscle disease because it measures creatinine levels, which are direct indicators of muscle metabolism and breakdown. Elevated creatinine levels signal increased muscle damage and help track disease progression and treatment effectiveness. While muscle diseases require clinical diagnosis through genetic testing, EMG studies, and muscle biopsies, the Chromium test provides essential ongoing monitoring of muscle health and helps doctors adjust treatment plans based on muscle metabolism patterns.

When should I get tested for muscle disease?

You should get tested if you experience progressive muscle weakness, difficulty climbing stairs or lifting objects, frequent falls, muscle cramps or pain that persists, or if you have a family history of muscular dystrophy or myopathy. Early testing is crucial if you notice children having trouble running or keeping up with peers, as many muscle diseases appear in childhood. Adults should seek testing if they develop unexplained muscle fatigue, difficulty swallowing, or breathing problems, as these may indicate serious muscle involvement requiring immediate attention.

What are the symptoms of muscle disease?
Symptoms of muscle disease include progressive muscle weakness that typically starts in the hips, thighs, and shoulders, difficulty standing from a sitting position, frequent tripping or falling, and muscle pain or cramping. You might notice enlarged calf muscles despite weakness, a waddling gait when walking, trouble lifting your arms above your head, or difficulty with fine motor tasks like buttoning shirts. Some people experience muscle stiffness, fatigue that worsens with activity, breathing difficulties, or heart problems as the disease affects respiratory and cardiac muscles.
Who is at risk for muscle disease?
People with a family history of muscular dystrophy or myopathy are at highest risk, as many muscle diseases are inherited through genetic mutations. Men are more likely to develop severe forms like Duchenne muscular dystrophy due to X-linked inheritance patterns, while both men and women can develop autoimmune muscle diseases like polymyositis. Children with developmental delays, adults over 50 who develop unexplained weakness, and individuals with autoimmune conditions like lupus or rheumatoid arthritis face increased risk of developing muscle disease.
What happens if muscle disease is left untreated?
Untreated muscle disease leads to progressive muscle weakness and wasting that eventually affects mobility, making walking impossible and requiring wheelchair use. As the condition advances, respiratory muscles weaken, causing breathing difficulties that may require ventilator support, while cardiac muscle involvement can lead to heart failure and life-threatening arrhythmias. Many people develop severe contractures where muscles and tendons permanently shorten, causing joint deformities and chronic pain. Without treatment, complications like pneumonia from weakened breathing, malnutrition from swallowing difficulties, and complete loss of independence significantly reduce quality of life and lifespan.
Can muscle disease be diagnosed with a blood test?
Blood tests cannot diagnose muscle disease on their own but provide crucial monitoring information about muscle damage and metabolism. The Chromium, Urine test measures creatinine levels that indicate muscle breakdown, while creatine kinase (CK) blood tests detect enzymes released when muscle fibers are damaged. Definitive diagnosis requires genetic testing to identify specific mutations, electromyography (EMG) to assess electrical muscle activity, and muscle biopsies to examine tissue under a microscope. Blood work serves as an important tool for tracking disease progression and treatment response once diagnosis is established.
How is muscle disease treated?
Treatment for muscle disease focuses on managing symptoms and slowing progression through corticosteroids like prednisone that reduce inflammation and preserve muscle strength, particularly in Duchenne muscular dystrophy. Physical therapy and stretching exercises help maintain flexibility and prevent contractures, while assistive devices like braces, walkers, and wheelchairs support mobility as weakness progresses. Newer treatments include gene therapy approaches, exon-skipping drugs like eteplirsen for specific genetic mutations, and immunosuppressants for autoimmune muscle conditions. Respiratory support with ventilators and cardiac medications address breathing and heart complications.
How can I prevent muscle disease?
Most muscle diseases cannot be prevented because they result from genetic mutations present at birth or autoimmune processes that develop unpredictably. However, genetic counseling before pregnancy helps families with a history of muscular dystrophy understand their risk and make informed reproductive decisions, while prenatal testing can detect certain genetic muscle diseases early. For acquired muscle diseases, maintaining overall health through balanced nutrition, regular gentle exercise, and avoiding excessive alcohol consumption may reduce risk. Early detection through newborn screening and prompt treatment can significantly improve outcomes even when prevention is not possible.
What can I do at home for muscle disease?
At home, you can perform gentle range-of-motion exercises and stretches daily to prevent joint stiffness and contractures that worsen disability. Eat a protein-rich, balanced diet to support muscle health, and consider working with a nutritionist if swallowing difficulties develop to ensure adequate calorie and nutrient intake. Use assistive devices like grab bars, raised toilet seats, and ramps to maintain independence and prevent falls. Join support groups to connect with others facing similar challenges, practice stress-reduction techniques, and maintain a regular sleep schedule to help your body manage the condition more effectively.
How’s this work?
Getting your blood test with us is easy, private & backed by the power of science.

Long story short:
  1. In the test options, use the filters or search box to narrow your choices and find the test you want.
  2. If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test.
  3. Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout.
  4. If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want.
  5. When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system.
  6. Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way.
  7. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!
  8. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.
How do I know which test to get?
In the test options, find the test you want. If you’re not sure which test to get, we can lend a hand in finding the right option.

Just text or call us at 754-799-7833, email us at support@privatemdlabs.com, and we'll gladly help you. We've got your back and reply quickly.
Is it possible to make changes to my lab order if I made a mistake with the name, date of birth, or any other details?
Absolutely! We totally understand that errors can happen. No worries, we're here to help you.

Just reach out to us via text at 754-799-7833 or shoot us an email at support@privatemdlabs.com. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you.

There are no changes necessary if your address is wrong on the requisition though. We don’t mail anything out.

Our lab requires an address to be listed to generate an order.
Do you accept health insurance?
Only HSA & FSA is accepted.

Our services are strictly self-pay and cannot be submitted to your health insurance provider except for Health Savings Accounts or Flexible Savings Accounts.

This policy applies to all insurance companies, including federal health insurance programs like Medicare.

If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com.
Can I cancel my order?
Yes.

We get it – sometimes your needs change.

As long as your samples haven’t been collected yet, we’re happy to help you cancel your order.

If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com.

You can read more about our cancellation policy here.
How can I find a lab location near me?
During the ordering process, you’ll be able to select a specific lab near you, with no strings attached! You can switch it up later easily and visit any of our authorized locations as long as it’s the same lab company you selected your test for (Quest Diagnostics or Labcorp).

Before you proceed with your order, feel free to browse through all our lab locations here. This will give you the peace of mind of knowing that there's a lab nearby your home, office or your favorite gym.

If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.
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What this means

Your testosterone levels are slightly below the optimal range. While this is not necessarily cause for concern, it may contribute to occasional fatigue, reduced motivation, or lower muscle mass over time.

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* Regular blood test results (e.g., CBC) typically start arriving the next business day after sample collection. More complex tests, such as hormone panels, may take up to 10–15 business days due to their complexity.

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Chromium, Urine
Google reviews 505 reviews
$443 $346
What's included
Fast & easy, results by email & SMS
No need to visit a doctor
Private & confidential
No insurance needed
Results explained
No extra fees paid at the lab

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