Long Covid
A comprehensive blood test designed to uncover the biological drivers behind persistent Long Covid symptoms and guide targeted care.
Turnaround time
2-3 working days
Biomarkers count
34
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Overview of the Long Covid Profile
The Long Covid blood test is a comprehensive 34-biomarker panel designed to investigate several areas of health that may be relevant when symptoms continue after a suspected or confirmed COVID-19 infection. It assesses inflammation, blood cells, iron status, liver and kidney function, cardiovascular and muscle markers, thyroid function, glucose, cholesterol, Vitamin D and pancreatic function.
This is a multi-system blood test panel rather than a diagnostic test for Long Covid. It may be useful for people experiencing ongoing fatigue, breathlessness, muscle symptoms, palpitations, brain fog or other persistent concerns who want broader laboratory information to discuss with a GP or specialist.
There is no single blood test that can confirm or rule out Long Covid. Results from this panel should be interpreted alongside your symptoms, the timing and severity of your previous COVID-19 infection, medical history, medications and any other investigations that may be clinically appropriate.
What Does the Long Covid Test Contain?
This test measures 34 biomarkers across inflammation, blood health, cardiovascular and muscle health, kidney function, liver function, iron status, metabolic health, thyroid function, pancreatic function and Vitamin D.
C-Reactive Protein - Measures CRP, a protein that can rise during inflammation. An elevated result is non-specific and should be interpreted alongside symptoms and other clinical findings.
D-dimer - Measures fragments produced when blood clots are broken down. Raised levels can occur for many reasons and do not by themselves confirm a blood clot.
CK-MB - Measures an isoenzyme of creatine kinase found particularly in heart muscle, although levels can also be influenced by other muscle-related factors.
Creatine Kinase - Measures an enzyme released from muscle tissue and may rise following muscle injury, strenuous exercise or other causes of muscle stress.
Myoglobin - Measures a protein found in muscle tissue that can enter the bloodstream following muscle injury or stress.
Troponin T - Measures a cardiac protein used when assessing possible heart muscle injury. An elevated result requires appropriate clinical interpretation.
Creatinine - Measures a waste product used to assess kidney filtration and is interpreted alongside eGFR and other kidney markers.
Cystatin C - Measures a protein used as an additional marker of kidney filtration and can provide complementary information to creatinine-based assessment.
eGFR - Estimates how effectively the kidneys are filtering waste from the bloodstream.
Aspartate Aminotransferase - Measures an enzyme found in the liver, muscles and other tissues. Increased levels may occur with liver or muscle cell injury.
Alanine Aminotransferase - Measures an enzyme found predominantly in the liver and commonly used when assessing liver cell health.
Albumin - Measures the main protein produced by the liver and provides information relevant to liver function, nutrition and fluid balance.
Alkaline Phosphatase - Measures an enzyme found mainly in the liver, bile ducts and bone and is interpreted alongside other liver-related markers.
Gamma- glutamyltransferase - Measures an enzyme associated mainly with liver and biliary function.
Total Bilirubin - Measures bilirubin produced during normal red blood cell breakdown and processed by the liver.
Eosinophils (EOSIN) - Measures a type of white blood cell involved in allergic responses, immune activity and responses to some parasitic infections.
Lymphocyte Count - Measures lymphocytes, white blood cells that play a central role in immune defence.
Neutrophil Count - Measures neutrophils, white blood cells involved particularly in responding to bacterial infection and inflammation.
White Blood Cell Count - Measures the total number of white blood cells and provides a general overview of immune and inflammatory activity.
Platelet Count - Measures platelets, blood cells involved in normal clot formation and prevention of excessive bleeding.
Ferritin - Measures the main iron-storage protein and provides information about the body's iron reserves. Ferritin can also rise during inflammation.
Iron - Measures circulating iron available in the blood at the time of testing.
Total Iron Binding Capacity - Measures the blood's overall capacity to bind and transport iron.
Transferrin - Measures the main protein responsible for transporting iron through the bloodstream.
Transferrin Saturation - Calculates the proportion of transferrin carrying iron and helps provide a fuller assessment of iron availability.
Glucose - Measures blood glucose at the time of collection and provides information relevant to blood sugar regulation.
HDL Cholesterol - Measures cholesterol carried by high-density lipoproteins and contributes to assessment of cardiovascular risk.
LDL Cholesterol - Measures cholesterol carried mainly by low-density lipoproteins and is an important cardiovascular risk marker.
Total Cholesterol - Measures the overall concentration of cholesterol circulating in the blood.
Total Cholesterol/HDL Cholesterol Ratio - Compares total cholesterol with HDL cholesterol to provide additional information about cholesterol balance.
Triglycerides - Measures circulating fats influenced by diet, metabolism, alcohol intake and other health factors.
Thyroid Stimulating Hormone - Measures TSH, the pituitary hormone that regulates thyroid hormone production and is commonly used as an initial thyroid function marker.
Lipase - Measures an enzyme produced mainly by the pancreas and used when assessing pancreatic health in the appropriate clinical context.
Vitamin D - Measures Vitamin D status, which is relevant to bone health, muscle function and several other physiological processes.
Who May Benefit From the Long Covid Profile ?
This test may be suitable for people experiencing ongoing symptoms after COVID-19 who want a broader laboratory assessment of several health systems that may contribute to, accompany or provide alternative explanations for persistent symptoms.
Investigate persistent fatigue after COVID-19 - Review iron status, thyroid function, inflammation, Vitamin D, blood cells and metabolic markers that may provide useful clinical context.
Assess ongoing muscle weakness or aches - Include CK, CK-MB and myoglobin alongside other general health markers.
Review persistent breathlessness or chest-related concerns - Assess selected cardiovascular, inflammatory and blood markers while recognising that symptoms may require additional investigations.
Investigate palpitations or reduced exercise tolerance - Provide laboratory information alongside clinical cardiovascular assessment where appropriate.
Explore ongoing brain fog or poor concentration - Review several metabolic, thyroid, iron and general health markers that may contribute to non-specific cognitive symptoms.
Check kidney and liver function after illness - Assess filtration markers and liver enzymes as part of a multi-system review.
Review inflammation and clotting-related markers - Measure CRP and D-dimer where these markers are considered relevant to the clinical picture.
Establish a post-illness baseline - Create laboratory results that can be compared with future testing during recovery.
Arrange a private blood test in London - Access a broad post-COVID health panel without waiting for a routine GP referral.
Symptoms and Reasons to Consider the Long Covid Test
You may wish to consider the Long Covid blood test if symptoms have persisted or developed following COVID-19 and you want broader laboratory information to support further clinical assessment.
Persistent fatigue or very low energy - One of the most commonly reported symptoms following COVID-19 and one that can also have several other medical causes.
Shortness of breath - Persistent breathlessness should be clinically assessed, particularly if it is new, worsening or associated with chest symptoms.
Brain fog or difficulty concentrating - Cognitive symptoms may persist after illness but can also overlap with nutritional, thyroid, sleep and other health concerns.
Muscle aches or weakness - Muscle-related biomarkers within the profile may provide additional information where these symptoms continue.
Chest discomfort or palpitations - Cardiovascular symptoms require appropriate clinical assessment, with blood markers providing only part of the picture.
Dizziness or reduced exercise tolerance - These symptoms can have cardiovascular, metabolic, haematological and other possible explanations.
Persistent headaches - Ongoing headaches following illness may require further assessment depending on severity and associated symptoms.
Changes in appetite or unexplained weight changes - Metabolic, thyroid and organ-function testing may provide useful context.
Ongoing symptoms several weeks or months after COVID-19 - A broad panel may help identify abnormalities or alternative contributors that warrant further investigation.
A need to monitor recovery over time - Repeat blood testing may help compare objective laboratory trends where this has been recommended clinically.
Long Covid can affect people differently, and symptoms may involve several body systems or fluctuate over time. Blood testing may identify abnormalities such as inflammation, iron deficiency, thyroid changes, organ-function changes or other findings that could contribute to symptoms, but many people with Long Covid may also have results within laboratory reference ranges.
There is no single laboratory marker that confirms Long Covid. Persistent symptoms should be interpreted alongside your medical history and clinical assessment. Seek urgent medical attention for severe or new chest pain, significant breathing difficulty, fainting, new neurological symptoms or other rapidly worsening symptoms.
How to Prepare
If you are currently experiencing a new acute infection or a significant flare of symptoms, some inflammatory and blood markers may reflect that immediate illness. If your goal is to establish your usual post-COVID baseline, discuss the most appropriate timing for testing where necessary.
How to Book Your Long Covid Test in London
Booking your Long Covid test with London Blood Tests is simple and designed to fit around your schedule.
Choose the Long Covid
Select the Long Covid blood test online and review the 34 included biomarkers before booking.
Select your sample collection option
Choose an in-clinic blood draw (+£35) or a home or hotel phlebotomy visit (+£60) where a qualified phlebotomist collects your sample.
Attend your appointment
A trained professional will collect your blood sample safely and efficiently at the clinic or during your arranged home or hotel visit.
Laboratory analysis
Your sample is sent to the laboratory, where markers covering inflammation, coagulation, cardiovascular and muscle health, kidney and liver function, iron status, cholesterol, glucose, thyroid function, Vitamin D and pancreatic function are analysed.
Receive your results securely
Your results are sent securely by email, ready to review yourself or discuss with a GP, Long Covid specialist or other qualified clinician.
When Will I Receive My Results?
The expected turnaround time for the Long Covid blood test is approximately 2–3 business days.
Your results are sent securely by email once laboratory analysis and authorisation are complete. Turnaround normally begins when the laboratory receives your sample rather than necessarily from the exact time your blood is collected.
Some markers may occasionally require repeat analysis or further laboratory review, which can extend the expected turnaround. Results significantly outside the expected range should be discussed with a GP, specialist or suitably qualified clinician.
Understanding Your Results
Your Long Covid panel will provide individual results together with the reference ranges used by the analysing laboratory. Reference ranges and analytical methods can differ between laboratories, so each result should be assessed using the information supplied on your own report.
A normal panel does not rule out Long Covid. Many people with persistent post-COVID symptoms may have routine blood tests within expected ranges. Likewise, one or more abnormal biomarkers do not automatically confirm that COVID-19 is responsible, because abnormalities may have other causes.
Results should be interpreted alongside the nature and duration of your symptoms, previous COVID-19 illness, age, sex, medical history, medications and other clinical investigations. If your symptoms remain unexplained or significantly affect day-to-day life, speak with a GP or appropriately qualified specialist.
Why Book With London Blood Tests?
Private blood testing in London - Access a comprehensive 34-biomarker Long Covid blood test through London Blood Tests.
Clinic and home visit options - Choose an in-clinic blood draw or arrange home or hotel phlebotomy depending on your location and availability.
Multi-system health assessment - Review markers relating to inflammation, cardiovascular and muscle health, kidney and liver function, iron, thyroid, metabolism and Vitamin D.
Secure results by email - Receive your authorised laboratory results securely once testing is complete.
Clear pricing before booking - The Long Covid blood test is priced at £199, with sample collection charges shown separately.
Convenient appointment process - Arrange private testing around your schedule with flexible collection options.
Support with choosing the right test - London Blood Tests can help if you are unsure whether this panel or another health profile is more appropriate for your needs.
Private testing without a long wait - Obtain laboratory information that can be reviewed with a GP or specialist without relying solely on routine testing pathways.
Private Long Covid Blood Test Profile in London
London Blood Tests provides a private Long Covid blood test in London for people experiencing persistent symptoms following COVID-19 who want a broad laboratory assessment of multiple health systems.
Clinic appointments are available alongside home and hotel phlebotomy depending on location and availability. Flexible sample collection makes it easier to arrange a private blood test near you while keeping the process convenient and discreet.
The Long Covid panel may provide useful laboratory information about inflammation, iron status, organ function, cardiovascular and muscle markers, thyroid function and metabolic health before speaking with a GP or specialist. It cannot diagnose Long Covid on its own, and further examination, imaging, heart or lung testing or specialist assessment may be appropriate depending on your symptoms.