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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
    • Client reviews
    • For business
  • Contact
    • FAQ
    • Contact us
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  3. Post covid syndroom basis
BloedCheckup

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Post-COVID Syndrome Basic

Hemoglobin, MCV, iron, ESR, creatinine, eGFR, platelets, and vitamin D. For persistent symptoms after coronavirus.

€110.00
  • No GP referral needed

Blood collection at collection point

How it works

  1. 01

    Order your test

    After your order you receive instructions by email

  2. 02

    Schedule your appointment

    Make an appointment at a collection point near you

  3. 03

    Visit the collection point

    Blood collection at 1,000+ locations across the Netherlands

  4. 04

    Receive your result

    Digitally by email once the analysis is complete.

Blood collection at collection point

How it works

  1. 01

    Order your test

    After your order you receive instructions by email

  2. 02

    Schedule your appointment

    Make an appointment at a collection point near you

  3. 03

    Visit the collection point

    Blood collection at 1,000+ locations across the Netherlands

  4. 04

    Receive your result

    Digitally by email once the analysis is complete.

What is Post-COVID Syndrome Basic?

The Post-COVID Syndrome Basic blood test is specifically developed for individuals with persistent symptoms after a coronavirus infection. Long COVID or post-COVID syndrome is characterized by prolonged symptoms such as extreme fatigue, shortness of breath, muscle weakness, concentration problems, and a general feeling of unwellness. This test examines important markers that can explain why your symptoms persist: residual infection, kidney status, blood counts, and vitamin D. It helps identify if there are treatable causes for your post-COVID symptoms.

What is tested?

  • Hemoglobin (Hb) – Oxygen-transporting protein
  • MCV – Mean corpuscular volume of red blood cells
  • Iron – Available iron for oxygen transport
  • ESR (Sedimentation Rate) – Erythrocyte sedimentation rate, inflammation marker
  • Creatinine – Kidney function
  • eGFR (Kidney Function) – Estimated glomerular filtration rate
  • Platelets – Blood platelets
  • Vitamin D – For the immune system and general health

Why should you get Post-COVID Syndrome Basic done?

This test is important for anyone with persistent symptoms after COVID-19 such as extreme fatigue, shortness of breath, muscle weakness, or cognitive problems. COVID-19 can affect the blood, kidneys, and immune system. The ESR (sedimentation rate) measures if there are still active inflammations. Hemoglobin and iron check for anemia that explains fatigue. Kidney function can be affected after COVID. Platelets can be disturbed, causing clotting problems. Vitamin D is crucial for the immune system and recovery. This test helps identify treatable causes of post-COVID symptoms.

What does it indicate?

The results provide insight into possible causes of your post-COVID symptoms. This basic test measures:

  • Inflammation Status – ESR (sedimentation rate) for persistent inflammation
  • Blood Counts – Hemoglobin, iron, and MCV for anemia
  • Kidney Function – Creatinine and eGFR
  • Coagulation System – Platelets for blood platelets
  • Immune System – Vitamin D for recovery and immunity

This information assists in developing a treatment plan for post-COVID recovery.

What does a high level mean?

Increased ESR indicates persistent inflammation after COVID that may require treatment. Elevated hemoglobin is rare but can indicate dehydration or blood thickening. High platelets can occur in response to inflammation. Elevated creatinine means reduced kidney function, which sometimes occurs after severe COVID and requires further evaluation. Very high vitamin D due to overdose of supplements can cause side effects. These abnormalities require medical evaluation and treatment.

What does a low level mean?

Low hemoglobin and iron are common after COVID and cause extreme fatigue and shortness of breath. Iron deficiency should be treated with supplements. Low platelets can indicate immune problems or bone marrow disorders after COVID. Low MCV indicates iron deficiency anemia. Low vitamin D weakens the immune system and significantly delays recovery - supplementation is essential. All these deficiencies are treatable, and improvement in these values often leads to a significant reduction in post-COVID symptoms such as fatigue and muscle weakness.

Blood draw
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Thousands of clients before you
1,000+ collection locations in the Netherlands
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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?

Often within a few working days. How soon you can be seen depends on how busy the location is and the type of analysis. For 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?

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.

Didn't find what you're looking for?

Need help?

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

WhatsAppWhatsApp+31 412 236 961E-mailinfo@bloedcheckup.nl

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

Client experiences

This is why clients choose us

88% recommend usBased on 165 verified Trustpilot reviews

“Hele fijne en snelle service”

Hele fijne en snelle service! Ik contacteerde ze ‘s nachts omdat ik zsm moest bloedprikken, ik kon die ochtend nog terecht en heb dezelfde dag mijn uitslag binnengekregen. Echt top!!

Madina ShinwariVerified

“Bloedcheckup levert”

Waar ziekenhuizen moeilijk doen om checkup te doen , komt Bloedcheckup naar boven drijven als vertrouwde partner op gebied van gezondheid. Ik ben uiterst tevreden met bloed checkup

JoaquinVerified

“Klantenservice was erg behulpzaam in…”

Klantenservice was erg behulpzaam in het beantwoorden van mijn vragen. Ik had ook een extra setje buizen nodig als back-up en dat was geen probleem. Ik had een groot test panel besteld, maar de resultaten waren binnen 1 week binnen. Rapport zag er netjes uit.

ErnstVerified

“Snelle en goede service”

Je hebt de spullen snel in huis en het is duidelijk wat je daarna moet doen. Ook de uitslag heb je snel in huis, ik dezelfde avond al de eerste uitslagen. Bij een bepaling ging het fout, niet eens door het bedrijf maar door het bloedafname punt en die bepaling kreeg ik gewoon vergoed, ook het geld terug stond erg snel op mijn rekening. Vragen worden ook snel beantwoord dus al met al een positieve ervaring bij Bloedcheckup.nl

AnoniemVerified

“Fijn bedrijf met geweldig veel opties…”

Fijn bedrijf met geweldig veel opties om zelfstandig je gezondheid in het oog te houden, als sporter een must want de dokters hebben toch geen verstand van wat relevant en anders is voor sport. Ook zeer tevreden over Stijn zelf! Aangename kerel en goed bereikbaar voor vragen en hulp tijdens bestellen :D

MyronVerified

“My experience was very positive”

My experience was very positive. I needed to pass several very specific tests. They provide 24/7 customer support. They were friendly and prompt.

Olesia TaldykinaVerified

“Top!”

Snelle en makkelijke afhandeling. Duidelijke instructies en binnen anderhalve dag al resultaat binnen. Top service!

ZerinaVerified

“Amazing service!”

Received a packet with everything needed, went to a walk in clinic (Amsterdam DC Clinic) where my blood was drawn and I was out the door within 5 minutes, and then after posting the samples, received results 2 days later. Results were easy to understand as well. Amazing service, would highly recommend!

Trudi CoetzeeVerified
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Indication-specific evidence

This test has clinical value for specific complaints or indications, but is not intended as screening without symptoms.

Rationale for this test

Deze test bevat standaard bloedwaarden die klinisch relevant zijn bij langdurige klachten na COVID-19. De Nederlandse richtlijn 'Langdurige klachten en revalidatie na COVID-19' beveelt diagnostiek aan bij aanhoudende symptomen, waarbij bloedonderzoek zoals hemoglobine, ontstekingsmarkers, nierfunctie en vitamine D onderdeel kunnen zijn van de evaluatie. De test is echter niet bedoeld als standaard-screening voor iedereen na COVID-19, maar voor mensen met specifieke aanhoudende klachten waarbij deze bloedwaarden helpen behandelbare oorzaken te identificeren.

Last reviewed on April 22, 2026

Sources consulted

Dutch clinical guidelines and healthcare organisations

  • Startpagina - Langdurige klachten en revalidatie na COVID-19 - Richtlijn - Richtlijnendatabase
See how it works
  • Multidisciplinair overleg na COVID-19 - Richtlijn - Richtlijnendatabase
  • International scientific literature

    • Post-COVID-19 Syndrome Comprehensive Assessment: From Clinical Diagnosis to Imaging and Biochemical-Guided Diagnosis and Management - PMC

    Independent information sources

    We recommend consulting these independent sources before ordering a preventive health check.

    • Client brochure PGO (NVvPG, September 2023)

      Brochure on preventive health checks: careful choice, reliability, pros and cons, checklist.

    • RIVM — Health tests

      Independent information about preventive health checks from the National Institute for Public Health and the Environment.

    • Thuisarts.nl

      Reliable patient information about illnesses and complaints from Dutch GPs (NHG).

    • Allesovertesten.nl (NVKC)

      Public-facing website of the Dutch Society for Clinical Chemistry with explanations of blood tests and laboratory values.

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