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Drug Screening At a Real Lab

Home test kits are unreliable. Corporate testing is expensive and not private. Zuivertest: lab-certified drug screening at 700+ labs in the Netherlands. You choose which substances. Only you see the results.

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Drug Screening Panels Individual Substance Tests
Doctor's Assessment Included
ISO 15189 Accredited Labs
No Referral Needed
Results in a few business days
Screening Panels

Choose your screening

Lab-certified drug screening: all analyses are performed at ISO 15189-accredited laboratories. Not with a test strip at home, but with the same equipment hospitals use.

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Don't see what you need? build your own test

Membership

Two screenings a year.
Always 15% off.

For ⁦€199,-⁩ a year you choose two screenings (worth € 130 each) and get 15% off all other tests. Clear, with no surprises.

Discover the membership Cancel yearly
Custom Panel

Build your own screening

Choose exactly which substances you want tested. No standard corporate panel, no unnecessary costs. You decide, only you see the result.

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24 biomarkers available
CDT (Carbohydrate-Deficient Transferrin) Cocaine Metabolite Ketamine Amphetamines 3-MMC See all
Sample report

Exactly what was tested, and what came back

Not a strip with two lines you have to interpret yourself. You get a lab report per substance, with the method used stated alongside it.

View Screening Panels See a sample screening report
Screening report ZT-2024-0871
Method
LC-MS/MS
Sample
Urine
Status
Complete
THC (cannabis) Not detected
Cocaine Not detected
Amphetamine Not detected
Opiates Not detected
Benzodiazepines Not detected
Validated by an ISO 15189 accredited laboratory
How It Works

Screening in 4 steps

No referral, no waiting, no questions. Order, test, and receive your results on your dashboard.

01

Choose your substances

Select a standard panel or build your own screening. We then create your lab referral.

02

Receive your lab referral

Within 1 business day you'll receive an email from ZorgDomein with a barcode. Orders outside business hours are processed from the next business day.

03

Get tested at a lab near you

Show the barcode on your phone and bring a valid ID. Done in under 15 minutes.

04

View your report

Assessed by a BIG-registered physician. Results typically within a few business days on your secure dashboard.

Your data is protected and never shared with third parties.
700+ locations
12 provinces
Test Locations

Professional test locations across the Netherlands

Certified laboratories for reliable results.

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Why Zuiver Test

Seven features, and what each one rests on

A screening is only worth something if somebody else accepts it. This is what sits underneath our result — point by point, with where it is recorded.

Verification sheet Zuivertest
No. Feature What it means Recorded in
01 Only you see your results No employer, insurer or third party has access. Your result sits behind your own account and goes nowhere else. Recorded in Your account No third party
02 You choose what gets tested With a corporate test your employer picks the panel. Here you assemble the substances to be screened yourself. Recorded in Self-assembled No fixed corporate panel
03 No referral and no waiting time You need no referral and you do not have to go through an occupational physician or a company health service. You order it yourself and get tested when it suits you. Recorded in No referral You order it yourself
04 Collection at a recognised sampling point You get tested at a regular collection point of your choosing — not at an occupational physician and not at home. Every location is on the map, with opening hours. Recorded in 700+ Nationwide network
05 Analysed in an accredited laboratory Analysis is carried out in laboratories accredited to the standard for medical laboratories — not with a rapid test or a home kit. Recorded in ISO 15189 Standard for medical laboratories
06 Assessed by a BIG-registered physician The result is assessed by a physician registered in the Dutch BIG register. Recorded in BIG register Publicly searchable
07 Every substance with its own unit You get no single "positive or negative" line. Each substance shows the measured value in the unit that substance is reported in, and what that means. Recorded in 24 substances in the screening Each with its own reporting unit

Zuiver reports concentrations against a cut-off rather than against a reference range — which is why this sheet carries no range bar.

Biomarker Library

Understand Your Health Markers

Dive deep into what each biomarker measures, why it matters for your health, and what your results mean.

Biomarkers
24
Categories
1
Marker
Alcohol (EtG) This test detects the presence of ethyl glucuronide (EtG) in urine. Drug Screening
Cannabinoids (THC) This test detects the presence of THC-COOH (11-nor-9-carboxy-THC), the primary urinary metabolite of THC. Drug Screening Unit ng/ml
Spice Synthetic Cannabinoids This test detects the presence of metabolites from synthetic cannabinoid compounds in urine. Drug Screening Unit ug/l
Ketamine This test detects the presence of ketamine and its primary metabolite norketamine in urine. Drug Screening
Phenibut This test detects the presence of phenibut and its metabolites in urine. Drug Screening

Reference values are indicative and laboratory-dependent

Explore All 24 Markers
Knowledge register

Documentation

Factual explanations of detection windows, cut-off values and test procedures. No judgment, no fluff.

DOC-069

How long does a drug work, and how long does it stay detectable?

[DETECTION TIMES & CUT-OFF VALUES] DOC-068

How long do drugs stay detectable?

[DETECTION TIMES & CUT-OFF VALUES] DOC-067

GP urgent care, your own GP or a lab test: where should you go?

[WORKPLACE & DRIVING LICENCE TESTING]
Full register 69 documents available
100% Private & Confidential

Want to know if your system is clean?

Lab results instead of a home test. Completely private. Report within a few business days.

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GDPR Compliant
Private & Confidential
Never Shared
Common Questions

Frequently Asked Questions

About privacy, the testing process, and what to expect.

No. Your results are behind a secured account that only you can access. No employer, insurer, or third party has access. Want to share them? You download a PDF yourself.
Home test strips give a yes/no answer with a high margin of error. A lab provides quantified values per substance, analysed with the same equipment hospitals use. In borderline cases, that's the difference between a false positive and a reliable result.
Our standard 5-panel screens for CDT, cocaine, ketamine, amphetamines, and 3-MMC. The extended 10-panel adds LSD, GHB, phenibut, 6-MAM, and opiates. You can also build a custom panel with exactly the substances you want.
Typically within a few business days after your lab visit. You get a notification as soon as your report is ready on your secure dashboard.
No. We only release results to you. If you're testing for pre-employment purposes, you can download a PDF and share it at your discretion. Without your active action, no one else gets access.
No. You order directly on our site. We arrange the lab referral for you via ZorgDomein. No appointment needed, no waiting list.
Yes. All analyses are processed at ISO 15189-accredited laboratories. Your report includes lab accreditation and analysis method details. You share it with your employer yourself if you choose to.
We create a lab referral for you via ZorgDomein. Within 1 business day you receive an email with a barcode. Orders outside business hours are processed from the next business day. If we need more information from you, we will contact you. You can visit the lab at any time.
Two things: a valid ID and the barcode from your ZorgDomein email (showing it on your phone is fine). The lab staff handles the rest. No BSN? Print the referral form from the ZorgDomein patient portal.
Depends on the location. Some labs accept walk-ins, others require an appointment. You'll see this when choosing your lab location, and we'll provide a booking link if needed.
Yes. Encrypted and stored in EU data centres. Only accessible with your login credentials. Never shared with third parties. Fully GDPR compliant.

Have a question?

Our team is happy to help. Ask your question and we'll respond as soon as possible.

We typically respond within 24 hours
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