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BloedCheckup
  • Tests
    • Test packages
    • Hormones
    • Cardiovascular
    • Thyroid
    • Vitamins
    • STD test guide
    • Custom test request
    View all tests
  • At-home tests
    • Fingerstick
    • Urine
    • Stool
    • Saliva
    • Hair
    • Swab
    View all at-home tests
  • How it works
    • How it works
    • Locations
    • Laboratories
    • Fasting guidance
    • Shipping
    • Blog
  • About us
    • About us
    • Customer reviews
    • For business
  • Contact
    • FAQ
    • Contact us
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BloedCheckup

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Test kit

Blood collection at collection point

  • After your order you receive instructions by email
  • Make an appointment at a collection point near you
  • Blood collection at 1,000+ locations across the Netherlands
  • Receive your results digitally by email

Post-COVID Syndrome Extensive

Blood count, CK, LD, leukocytes, magnesium, liver, and albumin. Extensive analysis for prolonged post-COVID symptoms.

Blood collection at collection point

  • After your order you receive instructions by email
  • Make an appointment at a collection point near you
  • Blood collection at 1,000+ locations across the Netherlands
  • Receive your results digitally by email

What is Post-COVID Syndrome Extensive?

The Post-COVID Syndrome Extensive blood test is a comprehensive analysis for individuals with prolonged symptoms after COVID-19. This test goes beyond the basic package and adds important markers for muscle condition, heart function, muscle breakdown, and nutritional status. Besides the lungs, COVID-19 can also affect the heart, muscles, and metabolism. This extensive analysis helps to determine which organ systems are affected and what causes persistent symptoms such as extreme fatigue, muscle weakness, pulmonary complaints, and malnutrition.

What is tested?

  • Hemoglobin (Hb) – Oxygen-transporting protein
  • MCV – Mean corpuscular volume of red blood cells
  • Iron – Available iron
  • ESR – Erythrocyte sedimentation rate, inflammation marker
  • Creatinine – Kidney function
  • eGFR – Estimated kidney function
  • CK (creatine kinase) – Marker for muscle breakdown
  • LD (lactate dehydrogenase) – Enzyme for tissue damage
  • Leukocytes – White blood cells (immune system)
  • Magnesium – For muscle and nerve function
  • ALT (liver) – Liver enzyme
  • Albumin (nutritional status) – Protein for nutritional status

Why should you get Post-COVID Syndrome Extensive tested?

This extensive test is suitable for individuals with severe or prolonged post-COVID symptoms. CK (creatine kinase) measures active muscle breakdown that can occur after COVID. LD (lactate dehydrogenase) is elevated with damage to the lungs, heart, or other tissues. Leukocytes check the immune system. Magnesium is crucial for muscle and heart function and is often low after COVID. ALT checks the liver, which can be affected. Albumin measures nutritional status, which is often poor after severe COVID. This test provides a more complete picture of the systemic effects of COVID on your body.

What does it indicate?

The results show which organ systems have been affected by COVID. This extensive test measures:

  • Muscle breakdown – CK (creatine kinase) for active muscle breakdown
  • Tissue damage – LD (lactate dehydrogenase) for lung, heart, or liver damage
  • Immune system – Leukocyte status
  • Muscle and heart function – Magnesium for cramps and heart problems
  • Liver function – ALT for liver inflammation
  • Nutritional status – Albumin for malnutrition or inflammation

These markers help determine which organs require attention and explain why recovery is so difficult.

What does a high level mean?

Elevated CK indicates active muscle breakdown due to COVID and requires rest and recovery. Elevated LD may indicate lung damage, heart damage, or liver damage after COVID. Elevated ESR means persistent inflammation. High leukocytes can indicate secondary infections or immune activation. Elevated ALT indicates liver inflammation that sometimes occurs after COVID. Elevated creatinine means kidney problems. These abnormalities require medical evaluation and targeted management to promote recovery.

What does a low level mean?

Low hemoglobin and iron cause extreme fatigue and should be addressed. Low leukocytes can indicate a weakened immune system after COVID. Low magnesium is very common after COVID and causes muscle cramps, heart problems, and fatigue. Low albumin indicates malnutrition or chronic inflammation and requires nutritional support. Low MCV indicates iron deficiency anemia. These deficiencies explain many post-COVID symptoms and are, fortunately, manageable with supplements, nutrition, and rest. Correcting these values often leads to significant improvement in condition and well-being.

Frequently asked questions

Answers to what people usually want to know.

How does it work from order to result?

After ordering we generate a referral letter and email you the instructions. You pick a collection point yourself and book an appointment there. Blood is drawn at the location, processed at the lab, and your result arrives digitally.

How quickly can I get tested?

Usually very quickly. Collection points typically have slots within a few days, sometimes even same-day. It depends on how busy the location is. For a few specialist analyses we first ship collection materials, which takes a bit longer.

Do I need to book an appointment?

At most collection points yes. Some accept walk-ins. This is clearly indicated per location. You choose the location that works best for you.

Do I need to fast before the test?
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That depends on the test. Whether fasting is required, and from what time, is clearly stated in the instructions you receive after ordering. No surprises at the counter.

When and how do I receive my result?

It varies per analysis: from same-day to a few working days. Standard values often come back quickly; analyses that go to an external lab can take a bit longer. You get an email with a link to your digital result, including a short explanation per value.

Where can I go for collection?

We work with 1,000+ collection points across the Netherlands. After ordering you'll see which locations near you are available and you pick where you'd like to go.

View locations on the map

Need help?

We're here for you. Send a message and we'll respond as soon as we can.

WhatsApp+31 412 236 961E-mailinfo@bloedcheckup.nlCollection points1,000+ across the Netherlands

Weekdays 09:00 – 17:00 · Outside hours we reply a bit later

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