GLP-1 Baseline Panel
Your starting point before the first injection: blood sugar, cholesterol, pancreas, liver, kidneys, thyroid and nutrients in one measurement.
In Leeuwarden you can have blood drawn at 1 location, by appointment according to the lab.
Coopmansstraat 21, Leeuwarden · 0.0 km from the centre
08:00 – 15:15 on weekdays Appointment only
Draw site of Certe · hours per the lab
Referral through ZorgDomein, barcode by e-mail within 1 business day. Bring a valid ID.
Map of the draw site in Leeuwarden
An outlined pin on the map is a location outside Leeuwarden.
Order online and pick a location above. A doctor reviews your results.
Your starting point before the first injection: blood sugar, cholesterol, pancreas, liver, kidneys, thyroid and nutrients in one measurement.
The 3-month safety and progress check clinics do: pancreas, liver, kidneys, salts and your metabolic progress on GLP-1 medication.
The 6-month measurement: everything from the check-in plus insulin, ApoB and your nutrients — especially relevant if you have been eating much less for a while.
HDL, LDL, total cholesterol and triglycerides — your cholesterol often improves a lot while losing weight. This test makes it visible.
The compact blood sugar check: HbA1c and fasting glucose. Want insulin and safety values measured too? Choose the GLP-1 baseline panel instead.
Iron status (ferritin, iron, transferrin) and vitamin D — eating a lot less also means taking in fewer nutrients.
Choose your baseline test or follow-up, or build a custom test.
You'll receive an email from ZorgDomein with a barcode within 1 business day. Orders placed outside office hours are processed from the next business day.
Show the barcode on your phone and bring a valid ID. Done in under 15 minutes.
A BIG-registered physician reviews your results and writes a personal report. On your dashboard within a few business days.
Choose your baseline test or follow-up, or build a custom test.
You'll receive an email from ZorgDomein with a barcode within 1 business day. Orders placed outside office hours are processed from the next business day.
Show the barcode on your phone and bring a valid ID. Done in under 15 minutes.
A BIG-registered physician reviews your results and writes a personal report. On your dashboard within a few business days.
All addresses for a blood draw in Leeuwarden at a glance.
Closed
Next opening: opens Monday 08:00, according to the lab's regular opening hours.
Opening hours
| Day | Hours |
|---|---|
| Monday | - |
| Tuesday | - |
| Wednesday | - |
| Thursday | - |
| Friday | - |
| Saturday | Closed |
| Sunday | Closed |
Drawn here: SHBG (Sex Hormone Binding Globulin), TSH (Thyroid Stimulating Hormone), ALT (Alanine Aminotransferase), AST (Aspartate Aminotransferase) (+10)
Not here: Complete Blood Count (CBC)
Location data: partner laboratories via the lab feed, updated 19 September 2026 20:06.
All 15 tests below can be drawn at 0 of the 1 venues in Leeuwarden.
Not drawn in Leeuwarden: Complete Blood Count (CBC). At checkout you will see an alternative nearby.
These locations are outside Leeuwarden, but close by. Distances are straight-line from Leeuwarden.
Ready to order a blood test? Order online and choose a location during checkout.
Upload it. We look up every determination and show you what we can and cannot run, before you pay.
Scan your test listChoose individual components, taken at a certified location in Leeuwarden.
HbA1c monitoring is increasingly important with age as diabetes risk rises. Regular testing supports early intervention and helps maintain metabolic health in later years.
Fasting glucose regulation can change with age. Regular monitoring supports diabetes prevention and metabolic stability for healthy ageing.
Insulin sensitivity naturally decreases with age. Monitoring fasting insulin supports early intervention and metabolic health maintenance in later years.
Amylase monitoring is important for seniors, as pancreatic function may change with age. Regular testing helps detect digestive health changes early.
Lipase monitoring is important for older adults, as pancreatic enzyme production may decrease with age, potentially affecting fat digestion and nutrient absorption. Regular testing helps identify age-related changes in pancreatic function early.
An ALT blood test measures alanine aminotransferase, an enzyme that sits mainly in the liver. If it ends up in the blood, liver cells have been damaged. In men the limit is 45 u/l, in women 34 u/l. For anyone losing weight this is one of the most useful values on the report. Fatty liver is the most common cause of a mildly raised number. And it is exactly the value that comes down as you lose weight.
LDL cholesterol is the cholesterol inside the particles that can build up in your artery wall. If you lose weight, that value eventually falls, but almost never first and almost never in a straight line. That surprises many people. In the first weeks of a programme your LDL can even come out higher than at the start, while your triglycerides have already dropped sharply. Nothing has gone wrong: you are measuring a body mid-change, not the end result. This page shows what moves in which phase, when to re-measure to see anything meaningful, and why your result belongs next to your own starting value rather than next to the limit printed on the page.
Triglyceride management is important for cardiovascular health as metabolic efficiency changes with age. Regular monitoring supports heart and metabolic health in later years.
Your ferritin level shows how much iron you have in store, but during a weight-loss programme it measures something else too. Excess weight involves low-grade inflammation, and ferritin rises in response as an acute-phase protein. Your starting value is therefore often higher than your actual iron store justifies. As you lose weight that inflammation subsides and your ferritin falls with it, even if nothing about your iron changes. That makes a falling value during weight loss usually a good sign. It does mean, though, that a deficiency previously masked only becomes visible now.
Vitamin B12 is considered especially important for older adults, as absorption may decline with age. Low levels have been associated with cognitive changes and anaemia. Regular monitoring may help healthcare providers support healthy ageing.
In Leeuwarden your blood is drawn at Gezondheidscentrum Albert Schweitzer on Coopmansstraat, a Certe draw site — the laboratory serving all of Friesland. Right in the city, easy to reach from any district.
You arrange it without a referral letter: order your blood test online and pick Leeuwarden at checkout. The draw is by appointment, at a time that suits you. If you measure regularly — say as a fixed check during your programme — you return to the same familiar address every time.
From Stiens, Burgum, Scharnegoutum or Buitenpost, Leeuwarden is often the most convenient place for a blood draw nearby.
Science-backed articles about blood values and health.
All phlebotomy points are operated by independent, certified laboratories. We partner with them to provide you with a reliable blood draw experience. These locations are not owned by SlimmerLab.
Have questions about your order, results, or the blood draw process? Please contact us directly, not the laboratory. We are happy to help.
Order your blood test online and choose a location near you during checkout.
Our team is happy to help. Ask your question and we'll respond as soon as possible.
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