Checking your blood values during weight-loss medication: the 3-month panel
The 3-month safety and progress check clinics do: pancreas, liver, kidneys, salts and your metabolic progress on GLP-1 medication.
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Included Markers
11 markersALT (Alanine Aminotransferase), AST (Aspartate Aminotransferase), HDL Cholesterol, HbA1c (Glycated Hemoglobin), Potassium, Sodium, Glucose (Fasting), Total Cholesterol, Lipase, Creatinine, Triglycerides
Are you a few months into a weight-loss injection such as semaglutide or tirzepatide? This check lets you follow your blood values while you lose weight.
It is a compact, focused panel: not a broad baseline, but the values that may be most worth following during your weight-loss journey. You order online, need no referral, and receive your results within a few working days with an assessment by a BIG-registered doctor.
Why this test?
During a weight-loss journey your blood sugar, your lipid values and sometimes your liver and kidney values can change. An interim check can show how those values move along with your journey.
If you did a baseline earlier, you can compare this result against it. That way, together with a doctor, you get a picture of the change rather than a single isolated snapshot.
Who is this test for?
- People who have been using a weight-loss injection for a few months and want to check their blood values
- People who want a compact check without a broad panel
- People who did a baseline earlier and want to compare the values
- People who want to arrange this without a referral
This check does not replace care from your doctor. Always discuss your weight-loss journey and your medication with a doctor.
What is tested?
- Blood sugar: HbA1c and fasting glucose.
- Cholesterol and fats: total cholesterol, HDL and triglycerides.
- Liver: ALT and AST.
- Kidneys and minerals: creatinine, sodium and potassium.
- Pancreas: lipase.
What can this test tell you?
Your blood sugar and lipid values can place your progress in context while you lose weight. Your liver, kidney and pancreas values give a view of how those organs are doing during your journey.
It remains a snapshot, not a diagnosis. The value lies mainly in the comparison with an earlier measurement and in a conversation with a doctor.
How is the sample collected?
Blood is drawn at a certified collection point. In the Netherlands there are 700+ locations, which you choose yourself after ordering.
This is a blood test without a GP: you pick a location and a moment that suits you. The draw usually takes only a few minutes.
When is this test useful?
This check can be useful a few months after starting a weight-loss injection, or whenever you want to follow your blood values in between.
If you want a broader view and also measure nutrients such as vitamin D, B12 and ferritin, an extended check fits better with that.
What do the results mean?
Your results appear with a reference range for each marker. Values outside that range are worth discussing with a doctor, who can place them in the context of your lifestyle and weight-loss journey.
A single value outside the range does not immediately point to a problem. It is about the overall picture and the change compared with an earlier measurement.
What happens after the results?
Your results are usually in your personal dashboard within a few working days, with the measured values next to the reference ranges. You view them whenever it suits you.
Every blood test result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.
Frequently Asked Questions
From order to report in 4 steps
No waiting, no referral. Just order and go.
Choose your test
Choose your baseline test or follow-up, or build a custom test.
Receive your lab referral
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.
Get tested at a lab near you
Show the barcode on your phone and bring a valid ID. Done in under 15 minutes.
Receive your report from the doctor
A BIG-registered physician reviews your results and writes a personal report. On your dashboard within a few business days.
Choose your test
Choose your baseline test or follow-up, or build a custom test.
Receive your lab referral
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.
Get tested at a lab near you
Show the barcode on your phone and bring a valid ID. Done in under 15 minutes.
Receive your report from the doctor
A BIG-registered physician reviews your results and writes a personal report. On your dashboard within a few business days.
Always a location near you
With 700+ certified phlebotomy points across the Netherlands.
What We Test
This test includes 11 biomarkers for a clear picture of your health.
| No. | Biomarker | Unit | Turnaround |
|---|---|---|---|
| 01 | ALT (Alanine Aminotransferase) Your ALT value shows how much alanine aminotransferase is in your blood. This enzyme sits mainly in the liver. That makes ALT the most liver-specific of the routine enzymes. When it reaches the blood, liver cells have been damaged. In adult men the reference range runs to 45 u/l, and in women to 34 u/l. A mildly raised result is common and has several causes. Fatty liver leads that list, well ahead of alcohol and hepatitis. | u/l | 1 day |
| 02 | AST (Aspartate Aminotransferase) Your AST value shows how much aspartate aminotransferase is circulating in your blood. It is an enzyme that leaks out whenever cells are damaged. AST sits in the liver, but equally in skeletal muscle, heart muscle, kidneys, brain and red blood cells. That is why a raised AST is not, on its own, a liver value. A hard training session the day before explains the result more often than liver disease does. The reference range runs up to 35 u/l in men and 31 u/l in women. What the number means only becomes clear alongside ALT, gamma-GT and CK. | u/l | 1 day |
| 03 | HDL Cholesterol HDL cholesterol is the amount of cholesterol carried inside the HDL particles in your blood. Those particles pick cholesterol up from your tissues and from the artery wall and take it back to the liver. That transport is what earned HDL the nickname good cholesterol. The nickname is misleading. HDL is above all a mirror of your metabolism: the value drops with excess weight, insulin resistance, smoking and inactivity, and it is those factors that carry the risk. Drugs that raise HDL substantially do not reduce the number of cardiovascular events. And more is not always better: at very high values, mortality in large population studies turns back upwards. So never read your HDL on its own. It only takes on meaning alongside your triglycerides, your LDL and your overall risk profile. | mmol/l | 1 day |
| 04 | HbA1c (Glycated Hemoglobin) HbA1c (glycated haemoglobin) reflects your average blood sugar levels over the past 2-3 months. It is the gold standard for long-term blood sugar monitoring and diabetes management. | mmol/mol | 2 days |
| 05 | Potassium Potassium is an essential electrolyte and mineral that helps regulate heartbeat, muscle contractions, nerve signals, and fluid balance. It is one of the most important minerals for cardiovascular health. | mmol/l | 2 days |
| 06 | Sodium Sodium is a vital electrolyte that regulates fluid balance, blood pressure, and nerve and muscle function. It is the primary cation in extracellular fluid and is closely regulated by the kidneys. | mmol/l | 2 days |
| 07 | Glucose (Fasting) Fasting glucose measures the level of sugar (glucose) in your blood after an overnight fast. It is one of the primary tests used to screen for and monitor diabetes and pre-diabetes. | mmol/l | 1 day |
| 08 | Total Cholesterol Total cholesterol measures the combined amount of HDL, LDL, and VLDL cholesterol in your blood. It provides an overview of your lipid status but should be interpreted alongside individual components for a complete cardiovascular risk picture. | mmol/l | 1 day |
| 09 | Lipase Lipase is a pancreatic enzyme responsible for breaking down fats during digestion. It is more specific to the pancreas than amylase and is a key marker for diagnosing and monitoring pancreatic conditions such as pancreatitis. | u/l | 6 days |
| 10 | Creatinine Creatinine is a waste product that is continuously produced in your muscles. The kidneys filter it out of the blood and remove it in urine. The blood creatinine level is therefore a core number for kidney function. In Dutch it is written both as creatinine and as kreatinine. Because production depends on your muscle mass, the same figure reads differently per person. A raised creatinine does not automatically point to a kidney problem. This page explains what high and low values can mean. It also covers the everyday things that shift the result temporarily. | umol/l | 1 day |
| 11 | Triglycerides Triglycerides are the most common type of fat in the body, used for energy storage. Elevated levels may be associated with increased risk of cardiovascular disease, especially when combined with other lipid abnormalities. | mmol/l | 1 day |
| Your result arrives once the slowest test is finished: 6 days. This is indicative; turnaround varies per laboratory. | |||
Preparation
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No hard training beforehand
RequiredNo heavy training, long endurance sessions or anything that leaves you out of breath in the 48 hours before the draw. Normal walking is fine.
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No alcohol beforehand
RequiredDrink no alcohol in the 24 hours before the draw.
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Come fasting
RequiredFrom 22:00 the evening before, eat and drink nothing except water. That is at least 8 hours. Skip coffee, tea, chewing gum and smoking that morning. Plan the draw before 10:00.
- Water is always fine. Drink as usual beforehand, it makes the draw easier.
- Take your usual medication, unless your own doctor told you otherwise.
Extend this panel
Tests from the same field, run on the same sample. Same draw, no second appointment.
Related Measurements
Discover more measurements for a complete picture of your journey.
Insulin Resistance (HOMA-IR)
Insulin resistance becomes more relevant with age. Track it with fasting glucose, insulin and your HOMA-IR score.
GLP-1 Baseline Panel
Your starting point before the first injection: blood sugar, cholesterol, pancreas, liver, kidneys, thyroid and nutrients in one measurement.
GLP-1 Extended Panel
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.
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