Which lab values are truly relevant for chronic fatigue?
Ferritin, vitamin B12, TSH and other markers can give important clues about possible causes.
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Over 200 biomarkers with reference ranges, clinical explanations and symptom-context framing – from single sample to long-term trend.
Inflammation & defence: CRP, leukocytes, antibodies, cytokines.
Gut flora, zonulin, calprotectin, candida, dysbiosis markers.
Haematology: erythrocytes, leukocytes, platelets, haemoglobin.
Albumin, globulin fractions, electrophoresis, amino acids.
Glucose, HbA1c, uric acid, lactate, energy metabolism.
Vitamin D, B12, iron, ferritin, magnesium, zinc.
Thyroid, HPA axis, sex hormones, cortisol, insulin.
Cholesterol, LDL, HDL, triglycerides, troponin, BNP.
Creatinine, GFR, cystatin C, urea – filtration function.
ALT, AST, GGT, bilirubin, alkaline phosphatase.
Neurotransmitters & markers of nerve function.
Ferritin, vitamin B12, TSH and other markers can give important clues about possible causes.
Open fatigue lab valuesA lab value becomes truly meaningful only together with symptoms, trends and related markers.
Read contextReference ranges, clinical meaning and action hints for every biomarker – clearly explained.
Browse biomarkersPacing, structured questionnaires and symptom tracking complement lab values in daily life.
Open pacing in daily lifeScan your lab report or enter values manually – across all labs.
Download the appPlace your values in the context of fatigue, PEM or pacing – instead of standing alone.
Open knowledge hubPeople rarely search for ferritin, CRP, or vitamin B12 without a broader question in mind. These pathways connect biomarker reading with ME/CFS, PEM, pacing, and structured assessments.
Fatigue
Use the fatigue hub when ferritin, vitamin D, B12, or thyroid-related questions are part of a larger exhaustion pattern.
PEM
Delayed worsening after activity often changes how symptom-related labs should be framed.
Questionnaires
Combine biomarkers with validated assessments instead of relying on lab values alone.
With Elara you log lab values right after your appointment and see trends at a glance – ferritin history, vitamin D curve, inflammation markers side by side. No more paper chaos.
Elara connects lab values with symptoms, energy and crash patterns – so you no longer guess, you know.
Photograph your lab report or type values in directly – Elara detects unit and reference range.
Ferritin curve, vitamin D trend, CRP history – see at a glance whether values improve or worsen.
Does your ferritin drop correlate with bad energy days? Elara makes those connections visible.
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ME/CFS is known for standard lab parameters often sitting within the normal range even though patients are severely affected. Abnormalities often only show up in more specific markers (NK cell function, hsCRP, HPA axis) or over time – not in a single value.
The reference range is based on population statistics. The "optimal" range is narrower and oriented towards clinical symptom freedom. Example: ferritin >15 µg/l counts as "normal", but for fatigue a value >50–100 µg/l is clinically desirable.
With Elara you document lab values together with symptoms, energy and crash patterns. That way you can see whether, say, an elevated CRP correlates with a bad symptom day or your ferritin rises after supplementation – and present those links in a structured way.
Values discussed in Long Covid include D-dimer and platelets (microclot hypothesis), NT-proBNP and troponin (cardiac involvement), autoantibody screening, EBV reactivation markers, IL-6 and the lipid profile. The research landscape is evolving quickly.
Medical note: This page is for general patient education and does not replace medical diagnosis or treatment. Lab values must be interpreted in clinical context by qualified medical professionals.
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