Tiredness
Investigate some common causes of fatigue: CBC, thyroid, iron, vitamins, glucose, and HbA1c.
Add to your order
No referral needed
Added to your order
Click the button to view your cart
A multi-system panel designed to explore some of the more common causes of persistent tiredness. It covers blood count, thyroid function, iron stores, vitamins, and blood sugar markers.
Why this test?
Persistent fatigue can have many possible causes, and often multiple factors may contribute at the same time. This panel measures markers across several systems that are commonly associated with tiredness, including thyroid function, iron stores, vitamin levels, and blood sugar regulation. Rather than testing one area in isolation, this approach may help identify which systems warrant further attention.
Who is this test for?
This test may be relevant for women who:
- Experience persistent fatigue that is not explained by sleep or lifestyle factors alone
- Want to explore multiple potential causes of tiredness in one test
- Have noticed a decline in energy levels over time
- Would like data to discuss with their healthcare provider
What is tested?
This panel measures markers across multiple systems:
- Complete Blood Count (CBC): evaluates red and white blood cells and platelets
- Thyroid: TSH, Free T3, Free T4
- Iron: Ferritin
- Vitamins: Vitamin B12, Vitamin D (25-OH)
- Blood sugar: Glucose (Fasting), HbA1c
What can this test tell you?
Fatigue may be associated with low iron stores (ferritin), thyroid imbalance, vitamin deficiencies (B12 or D), blood sugar fluctuations, or changes in the blood count. By testing across these areas simultaneously, this panel may help narrow down which factors could be contributing. It is worth noting that fatigue can also have causes that are not captured by blood testing, and results should be discussed with a healthcare provider.
How is the sample collected?
The test requires a blood draw at a certified sample point (afnamepunt). There are over 750 locations across the Netherlands. Since fasting is required, scheduling a morning appointment is recommended.
When is this test useful?
This test may be considered when:
- You feel persistently tired despite adequate rest
- You want to check multiple systems that may be contributing to fatigue
- You have not had recent blood work and want a broad fatigue-focused panel
- You want data to bring to a healthcare provider appointment
What do the results mean?
Each marker is shown with your value and the reference range. Low ferritin, abnormal thyroid values, low vitamin levels, or blood sugar irregularities may each contribute to fatigue. Sometimes multiple factors are present at once. Results should be interpreted by a healthcare provider who can consider them alongside your full clinical picture.
Preparation
Fasting is required for 8 to 12 hours before the blood draw (water is permitted). Schedule a morning appointment for the most accurate glucose results.
What happens after the results?
Your results are typically available within a few working days. Each marker is presented with your value, the reference range, and an explanation. These results can serve as a starting point for a conversation with your healthcare provider about possible next steps.
Frequently Asked Questions
From order to report in 4 steps
A hormone test without referral: test when you want, not only when symptoms are severe. No waiting list, just order and go.
Choose your hormone test
Browse our hormone panels and pick what you want tested. Compare markers and prices, or build a custom test.
Receive your lab referral
Within 2-3 hours you'll receive an email from ZorgDomein with a barcode. Orders outside business hours are processed the next business day.
Get tested at a lab near you
Show the barcode on your phone and bring a valid ID. Done in under 15 minutes.
Receive your report from the doctor
A BIG-registered physician reviews your hormone values and writes a personal report. On your dashboard within a few business days.
Choose your hormone test
Browse our hormone panels and pick what you want tested. Compare markers and prices, or build a custom test.
Receive your lab referral
Within 2-3 hours you'll receive an email from ZorgDomein with a barcode. Orders outside business hours are processed the next business day.
Get tested at a lab near you
Show the barcode on your phone and bring a valid ID. Done in under 15 minutes.
Receive your report from the doctor
A BIG-registered physician reviews your hormone values and writes a personal report. On your dashboard within a few business days.
Always a location near you
With more than 650+ certified phlebotomy points across the Netherlands.
What We Test
This test includes 9 biomarkers to give you a comprehensive health picture.
HbA1c (glycated haemoglobin) reflects your average blood sugar levels over the past 2-3 months. It is the gold standard for long-term blood sugar monitoring and diabetes management.
Learn moreThyroid-stimulating hormone (TSH) is produced by the pituitary gland and serves as the master regulator of thyroid function. TSH levels may help indicate whether the thyroid is producing appropriate amounts of hormones. Your healthcare provider can interpret your TSH results.
Learn moreFasting glucose measures the level of sugar (glucose) in your blood after an overnight fast. It is one of the primary tests used to screen for and monitor diabetes and pre-diabetes.
Learn moreFree T4 (thyroxine) is the main hormone produced by the thyroid gland. It may serve as a precursor that your body converts into the more active T3. Healthcare providers often consider Free T4 a primary indicator of thyroid gland output.
Learn moreVitamin B12 is considered essential for red blood cell formation, neurological function, and DNA synthesis. Deficiency may develop gradually and is sometimes associated with dietary patterns. Healthcare providers can help interpret your results.
Learn moreVitamin D is a fat-soluble vitamin that plays a key role in calcium absorption, bone health, and immune function. It is primarily produced in the skin through sunlight exposure and can also be obtained from certain foods and supplements.
Learn moreFree T3 (triiodothronine) is considered the most active thyroid hormone. It may play a key role in regulating metabolism, energy production, and body temperature. Healthcare providers often assess Free T3 alongside other thyroid markers for a comprehensive picture.
Learn moreFerritin is a protein that stores iron in your cells and releases it when your body needs it. Blood ferritin levels reflect your body's total iron stores and are the most sensitive indicator for iron deficiency.
Learn moreA complete blood count (CBC) is a comprehensive blood test that evaluates the major components of your blood: red blood cells, white blood cells, and platelets. It is one of the most commonly ordered blood tests and provides a broad overview of your overall health.
Learn moreHbA1c (Glycated Hemoglobin)
MetabolicHbA1c (glycated haemoglobin) reflects your average blood sugar levels over the past 2-3 months. It is the gold standard for long-term blood sugar monitoring and diabetes management.
HbA1c provides a long-term view of blood sugar control, unlike fasting glucose which reflects a single point in time. It is essential for diabetes diagnosis and management. Consult your healthcare provider.
TSH (Thyroid Stimulating Hormone)
ThyroidThyroid-stimulating hormone (TSH) is produced by the pituitary gland and serves as the master regulator of thyroid function. TSH levels may help indicate whether the thyroid is producing appropriate amounts of hormones. Your healthcare provider can interpret your TSH results.
TSH is widely considered the most sensitive initial screening test for thyroid disorders. Even subtle changes in thyroid function may be reflected in TSH levels before other thyroid markers become abnormal. Your healthcare provider may use TSH as a starting point for comprehensive thyroid evaluation.
Glucose (Fasting)
MetabolicFasting glucose measures the level of sugar (glucose) in your blood after an overnight fast. It is one of the primary tests used to screen for and monitor diabetes and pre-diabetes.
Fasting glucose is a cornerstone of metabolic health assessment. Elevated levels may indicate pre-diabetes or diabetes, while very low levels can also be clinically significant. Consult your healthcare provider for interpretation.
Free T4 (Thyroxine)
ThyroidFree T4 (thyroxine) is the main hormone produced by the thyroid gland. It may serve as a precursor that your body converts into the more active T3. Healthcare providers often consider Free T4 a primary indicator of thyroid gland output.
Free T4 may help your healthcare provider determine whether your thyroid gland is producing adequate hormone levels. Some experts consider it one of the most informative markers for detecting both overactive and underactive thyroid conditions early.
Vitamin B12
VitaminsVitamin B12 is considered essential for red blood cell formation, neurological function, and DNA synthesis. Deficiency may develop gradually and is sometimes associated with dietary patterns. Healthcare providers can help interpret your results.
Vitamin B12 is believed to be vital for healthy nerve cells, red blood cell formation, and DNA synthesis. Low levels may be associated with anaemia, fatigue, and neurological symptoms. Early detection through testing may help prevent long-term complications.
Vitamin D (25-OH)
VitaminsVitamin D is a fat-soluble vitamin that plays a key role in calcium absorption, bone health, and immune function. It is primarily produced in the skin through sunlight exposure and can also be obtained from certain foods and supplements.
Adequate vitamin D levels are essential for strong bones, a well-functioning immune system, and overall well-being. Low levels may be associated with an increased risk of bone disorders, mood changes, and weakened immunity. Consult your healthcare provider for personalised advice.
Free T3 (Triiodothyronine)
ThyroidFree T3 (triiodothronine) is considered the most active thyroid hormone. It may play a key role in regulating metabolism, energy production, and body temperature. Healthcare providers often assess Free T3 alongside other thyroid markers for a comprehensive picture.
Free T3 may help your healthcare provider evaluate how well your thyroid is functioning at a cellular level. Some experts suggest it can reveal conversion issues that other thyroid tests might miss, potentially offering a more complete understanding of thyroid health.
Ferritin
MineralsFerritin is a protein that stores iron in your cells and releases it when your body needs it. Blood ferritin levels reflect your body's total iron stores and are the most sensitive indicator for iron deficiency.
Iron is essential for oxygen transport, energy production, and immune function. Ferritin testing helps detect iron deficiency before anaemia develops, or iron overload which can damage organs. Consult your healthcare provider for personalised advice.
Complete Blood Count (CBC)
HematologyA complete blood count (CBC) is a comprehensive blood test that evaluates the major components of your blood: red blood cells, white blood cells, and platelets. It is one of the most commonly ordered blood tests and provides a broad overview of your overall health.
The CBC is a cornerstone of preventive healthcare and diagnostic medicine. It can help detect a wide range of conditions including anemia, infections, immune disorders, blood cancers, and clotting problems. Regular CBC testing supports early detection and ongoing health monitoring.
You Might Also Like
Explore more tests for your hormonal health journey.
Extended Health Checkup
Our broadest panel: CBC, thyroid, vitamins, lipids, liver, kidney, and HbA1c.
Basic Health Checkup
Key health markers: CBC, lipids, and Vitamin D.
Complete Metabolic Panel
Comprehensive metabolic panel: electrolytes, kidney, liver, glucose, HbA1c, and protein.
This test not quite right?
Build your own blood test from 179+ individual biomarkers — choose exactly what you need.
Have a question?
Our team is happy to help. Ask your question and we'll respond as soon as possible.