What is a Long Covid Blood Test?

The Long Covid Blood Test is a comprehensive panel designed to investigate the multi-system effects that can persist after a Covid-19 infection. Long Covid often affects several organs simultaneously, including the heart, lungs, liver, kidneys, thyroid, and immune system.

This profile combines markers from:

• Liver health (ALT, AST, ALP, GGT, bilirubin, albumin)
• Full blood count and immune cells
• Heart and muscle markers (CK, CK-MB, myoglobin, Troponin-T)
• Thyroid function (TSH)
• Inflammation and clotting (CRP, D-Dimer)
• Kidney function (creatinine, eGFR, Cystatin C)
• Iron status and nutritional markers
• Pancreatic marker (lipase)
• Glucose metabolism and Vitamin D

It is designed to detect underlying organ stress, inflammation, micro-clotting risk, and metabolic disruption that may explain persistent symptoms.

Why do I need a Long Covid test?

Many people continue to experience symptoms weeks or months after Covid infection, even when routine tests appear normal. Long Covid can affect multiple systems, making single tests insufficient.

This panel helps doctors identify where dysfunction may be occurring.

Common symptoms leading to testing include:

• Persistent fatigue and low energy
• Shortness of breath or chest tightness
• Brain fog and concentration problems
• Muscle aches and weakness
• Joint pain
• Palpitations
• Hair loss after Covid
• Ongoing inflammation
• Dizziness or weakness
• Unexplained weight changes

Testing helps uncover hidden inflammation, organ strain, and metabolic changes caused by the virus.

Benefits of the test

1. Multi-organ assessment

Checks liver, kidney, heart, thyroid, pancreas, and immune system together.

2. Detects hidden inflammation

CRP and blood count markers reveal ongoing immune activity.

3. Assesses clotting risk

D-Dimer helps evaluate micro-clotting linked to Long Covid.

4. Evaluates heart and muscle stress

Troponin, CK, and myoglobin assess cardiac and muscle strain.

5. Identifies metabolic disruption

Glucose and thyroid markers reveal energy regulation problems.

6. Detects nutritional depletion

Iron and Vitamin D often drop after viral illness.

7. Identifies kidney stress early

Cystatin C improves early kidney assessment.

8. Supports recovery planning

Results guide targeted recovery and monitoring.

Expanded benefit explanation
Long Covid rarely affects just one system. This combined panel provides a broad clinical picture, allowing clinicians to identify which organs are under stress and tailor recovery strategies accordingly.

Step-by-step — How testing works

We offer two UK-wide testing options:

Clinic testing
• Choose your nearest UK clinic
• Attend appointment
• Blood sample collected by clinician
• Sample analysed in laboratory
• Results securely returned

Home or hotel visit (+£60)
• Phlebotomist visits your home or hotel
• Blood sample collected safely
• No need to travel
• Sample transported to laboratory
• Results delivered confidentially

Both services are available across the UK.

Your results explained

Low levels

Low iron, Vitamin D, or albumin may indicate nutritional depletion after illness.

Typical UK ranges:
• Vitamin D: 50–125 nmol/L
• Ferritin:

• Men: 30–400 µg/L

• Women: 15–150 µg/L

Low levels may explain fatigue and weakness.

Normal levels

Organ function, inflammation, and metabolism appear stable.

Interpretation:
Persistent symptoms may require further specialist evaluation.

High levels

Elevated markers may indicate ongoing inflammation or organ stress.

Possible findings:
• Raised CRP showing inflammation
• Elevated D-Dimer suggesting clotting risk
• Raised liver enzymes indicating liver stress
• Elevated Troponin or CK showing heart or muscle strain
• Raised creatinine or Cystatin C indicating kidney stress

Interpretation:
Further medical assessment may be required to support recovery.