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Extended blood test for weight loss: your broader check with nutrients

€196,-

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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Included Markers

17 markers

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

Have you been using a weight-loss injection for a longer period and want a broader check? This extended blood test for weight loss looks not only at your blood sugar, cholesterol, liver and kidneys, but also at a number of nutrients.

Those who eat much less for a longer time in particular may benefit from insight into vitamin D, vitamin B12 and ferritin (your iron stores). 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?

After losing weight for a longer time while eating less, your nutrients can change alongside your metabolism. An extended check maps both: your metabolic values and a number of vitamins and minerals.

That way you get a broader picture at a later point in your journey, which you can discuss with a doctor.

Who is this test for?

People who have been using a weight-loss injection for a longer time and want a broader check
People who want to measure vitamins and iron alongside their metabolic values
People who want to follow or rule out a nutrient deficiency during a weight-loss injection
People who want to arrange this without a referral

This check does not replace medical advice. Discuss your journey and any deficiencies with a doctor.

What is tested?

Blood sugar and insulin: HbA1c, fasting glucose and fasting insulin.
Cholesterol and fats: total cholesterol, HDL, triglycerides and ApoB.
Liver: ALT, AST and albumin.
Kidneys and minerals: creatinine, sodium and potassium.
Pancreas: lipase.
Nutrients: vitamin D, vitamin B12 and ferritin.

What can this test tell you?

Your blood sugar, insulin and lipid values can place your metabolism and progress in context. Your liver and kidney values give a view of those organs at this point in your journey.

Because eating less for a long time can affect your nutrients, insight into vitamin D, vitamin B12 and ferritin may be relevant. Together these remain a snapshot, not a diagnosis.

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 extended check can be useful further into your journey, for example after several months, or whenever you want to measure your nutrients alongside your metabolic values.

If you prefer a more compact interim check, a shorter panel may fit better. Some people alternate a broad and a compact measurement during their journey.

What do the results mean?

Your results appear with a reference range for each marker. Values outside that range, including for vitamins, are worth discussing with a doctor, who can place them in context.

A single value outside the range does not immediately point to a problem. It is about the overall picture and the change over time.

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

For reliable glucose, insulin and triglyceride values it is usually necessary to fast for 8 to 12 hours. Drinking water during that period is fine.

No. You arrange this check without a referral and choose your own collection point. You can then discuss the results with your GP.

This check measures vitamin D, vitamin B12 and ferritin (a measure of your iron stores), among others. During prolonged reduced food intake in particular, these values can be relevant to follow.

The baseline is your starting point before you begin. The 3-month check is a compact interim panel. This extended check adds nutrients and insulin for a broader picture later in your journey.

What We Test

Biomarkers in this panel, with unit and turnaround
No.	Biomarker	Unit	Turnaround
01	Insulin (Fasting)	pmol/L	5 days
02	ALT (Alanine Aminotransferase)	u/l	1 day
03	AST (Aspartate Aminotransferase)	u/l	1 day
04	HDL Cholesterol	mmol/l	1 day
05	HbA1c (Glycated Hemoglobin)	mmol/mol	2 days
06	ApoB (Apolipoprotein B)	g/l	4 days
07	Vitamin B12	pmol/l	3 days
08	Ferritin	ug/l	2 days
09	Potassium	mmol/l	2 days
10	Sodium	mmol/l	2 days
11	Glucose (Fasting)	mmol/l	1 day
12	Total Cholesterol	mmol/l	1 day
13	Albumin	g/l	2 days
14	Lipase	u/l	6 days
15	Creatinine	umol/l	1 day
16	Vitamin D (25-OH)	nmol/l	3 days
17	Triglycerides	mmol/l	1 day
	Your result arrives once the slowest test is finished: 6 days. This is indicative; turnaround varies per laboratory.

Preparation

Been ill? Wait a little
Required

Had a fever, an infection or a vaccination in the past 2 weeks? Wait with the draw until you are fully recovered. These values react to inflammation and would give a distorted picture.
Pause biotin
Required

Do you take a supplement with biotin (vitamin B8, common in hair, skin and nail supplements)? Stop it 72 hours before the draw. Biotin interferes with the measurement of these values.
No hard training beforehand
Required

No heavy training, long endurance sessions or anything that leaves you out of breath in the 48 hours before the draw. Normal walking is fine.
No alcohol beforehand
Required

Drink no alcohol in the 24 hours before the draw.
Come fasting
Required

From 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.