Electrolytes
A focused blood test of the four key electrolytes: sodium, potassium, calcium and magnesium, for insight into your fluid, nerve and muscle balance in one blood draw.
View all 4 biomarkers
Sodium
Electrolyte; regulates fluid balance and blood pressure.
Potassium
Electrolyte; important for heart conduction and muscle function.
Calcium
Mineral for bone, muscle and nerve function.
Magnesium
Mineral involved in muscle and nerve function and energy production.
- 4 biomarkers measured
- Doctor-reviewed report
- Results within a few working days
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, within a few 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 ›
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 na het prikken de resultaten met uitleg ontvangen. Kom hier zeker vaker terug!
Ik heb eerder onderzoeken laten uitvoeren door andere organisaties, maar Bloodworks steekt daar met afstand bovenuit. De snelle service, het persoonlijke contact en de transparantie hebben ervoor gezorgd dat ik al mijn vervolgonderzoeken hier laat uitvoeren.
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 aantal waardes aan te vullen, en daadwerkelijk geen last meer van mijn klachten. Super dankbaar, vakkundig en bekwaam.
FAQ
Frequently asked questions
Do I need to fast?
Fasting is not strictly required for electrolytes, but we recommend fasting (8 hours) for a reliable picture, especially for magnesium.
What exactly are electrolytes?
Electrolytes are minerals with an electrical charge (sodium, potassium, calcium, magnesium) that are essential for fluid balance, nerve signalling, muscle function and heart rhythm.
When is an electrolyte test useful?
With complaints such as muscle cramps, palpitations, fatigue or tingling, or when using diuretics, antacids or during intensive sport.
How is this different from Vitamins, minerals and electrolytes?
This package focuses specifically on the four electrolytes. If you want a broader picture with vitamins and iron included, choose Vitamins, minerals and electrolytes.
How quickly do I get my results?
Typically within a few working days of the blood draw, including interpretation by our doctor.
Ready to gain insight?
Electrolytes · 4 biomarkers · results within a few working days
89,-
All-in, blood draw included