Value package
Fatigue & Sleep
A comprehensive blood test with markers related to energy, recovery, and sleep, for broader insight into the factors influencing your vitality.
Fatigue & Sleep is a blood test measuring 8 biomarkers, reviewed by a doctor. Below you see exactly what is measured and what those results tell you.
Personal assessment by our BIG-registered doctors
Fatigue & Sleep
With this test, another €36 and your blood draw fee is waived
Complete your test
Next step: choose your blood draw location
Composition
What exactly is measured
All 8 biomarkers at a glance. The laboratory's reference values always lead.
Fatigue & Sleep189,-
- TSH + Free T4 (Thyroid)
- Ferritin
- Vitamin B12
- Folic Acid (B11)
- Vitamin D
- Cortisol (morning)
- Magnesium
- Full Blood Count
How Bloodworks works
Order online
Choose your package and preferred location
Receive your lab form
Within 24 hours by email, with appointment planner
Schedule your blood draw
Or choose a walk-in location
Blood draw
Takes just a few minutes
Receive your report
Securely, typically within 2 working days from our physicians
Included
Your personal health dashboard
Sample view · fictitious data.
Within range
of the biomarkers within the lab reference
Latest measurement: 1 Jul 2026
Needs attention
Your development
Vitamine D3
- All your results in one secure place
- See your development with every new measurement
- Compare against your own earlier values
Included
Your laboratory report
Every abnormality is given context and advice by a doctor. Reference values always come from the laboratory.
Client
Reference
Collection date
06-05-2025
Report date
08-05-2025
2 abnormalities found
Magnesium & vitamin D too low, see explanation
Vitamins & Minerals
Doctor comment
Your magnesium and vitamin D are markedly reduced. This can contribute to fatigue, muscle cramps and lower immunity. Supplements are generally available over the counter in the Netherlands. At your levels, however, we advise read more ›
Clinical labs
ISO 15189-accredited laboratories
Venepuncture
Full venous draw, as in a hospital
Our own doctors
Every result reviewed and interpreted
Your trend
Every value over time in your dashboard
Experiences
What customers say
Vanuit de sportschool geattendeerd op Bloodworks en heel tevreden. Bloedonderzoek online besteld en kon direct terecht bij een lab in de buurt. Kreeg het labformulier per e-mail en…Ik heb eerder onderzoeken laten uitvoeren door andere organisaties, maar Bloodworks steekt daar met afstand bovenuit. De snelle service, het persoonlijke contact en de…Na geregeld duizelig te voelen ben ik langs geweest bij Bloodworks voor een bloedtest, snelle service en super snel uitslag gekregen! Advies gekregen van de specialisten om een…FAQ
Frequently asked questions
Do I need to fast?
Yes, for this package we advise fasting for 8 hours, particularly for magnesium and cortisol. Drink water only during this period.
What is the best time to have blood drawn?
We recommend having your blood drawn in the morning between 7 and 10 o'clock, cortisol is at its highest then and most suitable for interpretation.
How does this compare to a GP visit?
This package gives insight into values that can also be measured by your GP. You can use the report for your own insight or discuss it with your GP.
What if I take thyroid medication?
Thyroid medication affects TSH and T4. Please let us know so we can adjust the interpretation accordingly.
What if I take supplements?
Some supplements (especially high-dose B12 and biotin) can affect measurements. For a baseline measurement, we recommend stopping 1–2 weeks beforehand if possible.
How often should I have this measured?
A single measurement is sufficient for initial insight. For follow-up or when starting lifestyle interventions, re-testing after 3–6 months is common.
What if I want more specific markers?
Through Bloodworks Select you can add markers such as homocysteine, Holo-TC (active B12), or testosterone.
How quickly do I receive my results?
Typically typically within 2 working days of blood draw.
Ready to gain insight?
Fatigue & Sleep · 8 biomarkers · results typically within 2 working days