About this test

What this test covers

A targeted test of your thyroid function with TSH and Free T4, for insight into energy, weight and metabolism in a single blood draw.

See the biomarkers in this test below

Thyroid

Thyroid function

119,-

All-in · blood draw costs included

What's measured

TSH

Free T4

Interpreted by BIG-registered doctors

Secure payment · 800+ collection points · Results by email

Biomarkers in this test

Tap a biomarker for details

2biomarkers gemeten

TSH

Pituitary thyroid hormone; the most sensitive marker for thyroid function.

Free T4

The active thyroid hormone, complementary to TSH for a complete picture.

How it works

From order to a clear report

Step 1 of 4

Order the blood test of your choice

Choose a complete package, a focused theme, or build your own test.

Packages, themes or build your own

Step 2 of 4

Select your location and pay

Choose a collection point near you and pay securely.

800+ collection points · iDEAL, Klarna, card

Step 3 of 4

Lab form by email and blood draw

Right after payment you receive your lab form by secure email. Take it to your collection point.

Secure email · walk-ins welcome

Step 4 of 4

A clear report you understand

You receive your results by secure email: clear, abnormalities flagged and interpreted by a doctor.

All values clearly presented. Each measurement next to the reference range from your laboratory.
Abnormalities clearly flagged. Elevated or reduced values immediately visible with colour coding.
Doctor interpretation. Every abnormality given context and advice by a doctor.

Uw gezondheid, inzichtelijk

Laboratoriumrapport

Cliënt

Referentie

Afnamedatum

06-05-2025

Rapportdatum

08-05-2025

2 afwijkingen gevonden

Magnesium & Vitamine D te laag, zie toelichting

Vitamines & Mineralen

Totaal cholesterol4.8<5.0OK

HDL-cholesterol1.4>1.2OK

LDL-cholesterol2.9<3.0OK

Magnesium0.52>0.7LAAG

Vitamine D18>50LAAG

Arts-commentaar

Uw Magnesium en Vitamine D zijn flink verlaagd. Dit kan bijdragen aan vermoeidheid, spierkrampen en verminderde weerstand. Supplementen zijn doorgaans vrij verkrijgbaar in Nederland. Bij uw waarden adviseren wij echter lees meer ›

Geautoriseerd door arts · BIG-geregistreerdDr. [naam vertrouwelijk]

Good to know

Benefits and limitations of blood testing

A blood test offers valuable insight into your health, but it also has limitations. We set out both honestly, so you can make a well-considered choice.

Benefits

Early signals: deviations can become visible before you notice symptoms.
A complete picture in one draw: key values clearly together.
Interpreted by a doctor: you get context with your results, not just numbers.
Track your health over time: repeat easily and see changes.
Accessible: no referral needed, a draw at 800+ locations.

Points to consider

An abnormal value does not always mean something is wrong; sometimes it is normal for you or a recheck is needed.
A normal result does not rule out every condition.
Some findings may lead to unnecessary worry or follow-up testing.
A blood test is a snapshot in time and does not replace a medical diagnosis.
Do you have symptoms or doubts? Always discuss these with a doctor.

We value honest information. For independent information on the benefits and limitations of health tests, we are glad to refer you to the Dutch RIVM, pros and cons of health tests.

Veelgestelde vragen

Alles wat u wilt weten

Do I need to fast?

Fasting is not required for TSH and Free T4. We do recommend taking the sample at a calm time of day.

What is the difference between TSH and Free T4?

TSH is the hormone from the pituitary gland that stimulates the thyroid. Free T4 is the thyroid hormone itself in its active form. The combination gives the most complete picture.

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 want more specific markers?

Through Bloodworks Select you can add markers such as Free T3, TPO antibodies or TG antibodies.

How quickly do I receive my results?

Typically within 2 business days of blood draw.

Still have questions?WhatsApp support@bloodworks.nl