Fatigue

Persistent fatigue can have many possible causes, and it is not always easy to identify the source from symptoms alone. This panel measures markers from several body systems that are commonly associated with tiredness. By testing them together, you may be able to narrow down which area warrants closer attention.

This test may be relevant for:

• People who experience persistent tiredness that does not improve with rest
• Those who feel low in energy despite adequate sleep
• Anyone who wants to investigate possible causes of fatigue before visiting a doctor
• People who want a targeted panel that covers the most commonly associated markers

This panel includes:

• CBC (Complete Blood Count): measures red and white blood cells and platelets, which can reflect overall blood health
• Ferritin: an indicator of iron stores, low levels of which are commonly associated with fatigue
• Free T3 and Free T4: active thyroid hormones that influence energy and metabolism
• TSH: thyroid-stimulating hormone, the primary regulator of thyroid function
• Glucose (Fasting): a measure of blood sugar at the time of testing
• HbA1c: reflects average blood sugar regulation over the past 2 to 3 months
• Vitamin B12: involved in nerve function and red blood cell production; deficiency may contribute to fatigue
• Vitamin D: associated with energy levels and immune function; low levels are common, especially during winter months

The results may help identify potential contributing factors to fatigue. Low ferritin can suggest depleted iron stores, even when hemoglobin is still within range. Thyroid markers outside the expected range may point to an underactive or overactive thyroid. Low Vitamin B12 or Vitamin D can be associated with reduced energy. Glucose and HbA1c may indicate whether blood sugar regulation could be playing a role.

In many cases, a combination of findings provides more insight than any single marker. The results can serve as a starting point for a conversation with a healthcare provider.

This test uses a blood sample collected at a certified sample point (afnamepunt). With over 750 partner locations across the Netherlands, you can pick a location that is convenient for you. A trained phlebotomist performs the blood draw, and results are typically available within a few working days.

This test may be useful when:

• You have been feeling tired for an extended period without a clear explanation
• You want to check for common causes of fatigue before or alongside a visit to your doctor
• You have made lifestyle changes but still experience low energy
• You want to rule out nutritional or hormonal factors that could be contributing to tiredness

Each marker is presented with your value and the reference range. Values within range generally suggest that the tested parameter is functioning as expected. Values outside the range may point to an area that could be contributing to your symptoms.

Fatigue is often multifactorial, so reviewing the full set of results together can be more informative than focusing on individual markers. Your report provides explanations for each result, and we recommend discussing findings with a healthcare provider for personalised interpretation.

Fasting for 8 to 12 hours before your appointment is required for accurate glucose results. Water is allowed during the fasting period. Morning collection is recommended. Avoid strenuous exercise in the 24 hours before the test.

Your results are typically available within a few working days. The report includes your values alongside reference ranges with clear explanations for each marker. If any values are outside the expected range, this is highlighted. We recommend discussing your results with a healthcare provider, who can place them in context with your symptoms and advise on follow-up steps.