Insulin (Fasting) ALT (Alanine Aminotransferase) TSH (Thyroid Stimulating Hormone) AST (Aspartate Aminotransferase) HDL Cholesterol HbA1c (Glycated Hemoglobin) Bilirubin (Total) ApoB (Apolipoprotein B) Vitamin B12 Ferritin Potassium Sodium Glucose (Fasting) Total Cholesterol Albumin Lipase Creatinine Vitamin D (25-OH) Triglycerides Bilirubin (Direct) Bilirubin (Indirect) HOMA-IR eGFR (Estimated Glomerular Filtration Rate) LDL Cholesterol Cholesterol/HDL Ratio Non-HDL Cholesterol LDL/HDL Ratio

€214,-

Heart & Metabolism

GLP-1 Check-in Panel

The 3-month safety and progress check clinics do: pancreas, liver, kidneys, salts and your metabolic progress on GLP-1 medication.

ALT (Alanine Aminotransferase) AST (Aspartate Aminotransferase) HDL Cholesterol HbA1c (Glycated Hemoglobin) Potassium Sodium Glucose (Fasting) Total Cholesterol Lipase Creatinine Triglycerides eGFR (Estimated Glomerular Filtration Rate) LDL Cholesterol Cholesterol/HDL Ratio Non-HDL Cholesterol LDL/HDL Ratio

€109,-

Heart & Metabolism

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.

Insulin (Fasting) ALT (Alanine Aminotransferase) AST (Aspartate Aminotransferase) HDL Cholesterol HbA1c (Glycated Hemoglobin) ApoB (Apolipoprotein B) Vitamin B12 Ferritin Potassium Sodium Glucose (Fasting) Total Cholesterol Albumin Lipase Creatinine Vitamin D (25-OH) Triglycerides HOMA-IR eGFR (Estimated Glomerular Filtration Rate) LDL Cholesterol Cholesterol/HDL Ratio Non-HDL Cholesterol LDL/HDL Ratio

€196,-

Heart & Metabolism

Lipid Screening

HDL, LDL, total cholesterol and triglycerides — your cholesterol often improves a lot while losing weight. This test makes it visible.

Triglycerides LDL Cholesterol Total Cholesterol HDL Cholesterol Cholesterol/HDL Ratio Non-HDL Cholesterol LDL/HDL Ratio

€80,-

Heart & Metabolism

Diabetes Panel

The compact blood sugar check: HbA1c and fasting glucose. Want insulin and safety values measured too? Choose the GLP-1 baseline panel instead.

HbA1c (Glycated Hemoglobin) Glucose (Fasting)

€64,-

Vitamins & Blood

Vitamin and Iron Panel

Iron status (ferritin, iron, transferrin) and vitamin D — eating a lot less also means taking in fewer nutrients.

Iron (Serum) Transferrin Saturation Vitamin D (25-OH) Ferritin Transferrin

€104,-

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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. No BSN? Then bring your printed referral form instead. 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. No BSN? Then bring your printed referral form instead. 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.

Ready to order a blood test? Order online and choose a location during checkout.

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Build your own blood test in Zuid-Holland

Choose individual components, taken at a certified location in Zuid-Holland.

Metabolic

HbA1c (Glycated Hemoglobin)

HbA1c monitoring is increasingly important with age as diabetes risk rises. Regular testing supports early intervention and helps maintain metabolic health in later years.

Learn more

Metabolic

Glucose (Fasting)

Fasting glucose regulation can change with age. Regular monitoring supports diabetes prevention and metabolic stability for healthy ageing.

Learn more

Metabolic

Insulin (Fasting)

Insulin sensitivity naturally decreases with age. Monitoring fasting insulin supports early intervention and metabolic health maintenance in later years.

Learn more

Liver

Amylase

Amylase monitoring is important for seniors, as pancreatic function may change with age. Regular testing helps detect digestive health changes early.

Learn more

Liver

Lipase

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.

Learn more

Liver

ALT (Alanine Aminotransferase)

ALT is the liver value that moves most clearly with your weight. It is a protein that liver cells use to process nutrients; it leaks into your blood as soon as liver cells are damaged, so the number shows how much damage there is right now. For men up to 45 U/L is normal, for women up to 34 U/L. Anyone losing weight usually sees a mildly raised ALT fall within a few months, because the most common cause of such a rise, fat in the liver, is exactly the fat that goes first. That is why this is the most useful value to measure before a programme.

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Cardiovascular

LDL Cholesterol

Your LDL cholesterol tells you how much cholesterol sits inside your LDL particles, 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 rather than the end result. This page shows what moves in which phase, when to re-measure to see anything meaningful, what the 3.0 mmol/l target means for you, and why your result belongs next to your own starting value.

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Cardiovascular

Triglycerides

Triglyceride management is important for cardiovascular health as metabolic efficiency changes with age. Regular monitoring supports heart and metabolic health in later years.

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Minerals

Ferritin

Your ferritin value tells you how much iron you have in store, because ferritin is the protein that stores iron, 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, so your starting value is 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.

Learn more

Vitamins

Vitamin B12

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.

Learn more

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SlimmerLab Browse Tests

Blood test in Zuid-Holland

Locations by province

Blood tests in Zuid-Holland

GLP-1 Baseline Panel

GLP-1 Check-in Panel

GLP-1 Extended Panel

Lipid Screening

Diabetes Panel

Vitamin and Iron Panel

From order to report in 4 steps

Choose your test

Receive your lab referral

Get tested at a lab near you

Receive your report from the doctor

Choose your test

Receive your lab referral

Get tested at a lab near you

Receive your report from the doctor

Build your own blood test in Zuid-Holland

HbA1c (Glycated Hemoglobin)

Glucose (Fasting)

Insulin (Fasting)

Amylase

Lipase

ALT (Alanine Aminotransferase)

LDL Cholesterol

Triglycerides

Ferritin

Vitamin B12

Read more about blood testing

Elevated liver values: what can the causes be?

Zinc deficiency: symptoms and when a blood test makes sense

Metabolic syndrome: the five criteria and what your blood shows

Anaemia in older adults: causes and when to get tested

Ready to get started?

Have a question?