Retest upgrade: your key values over time
The Retest upgrade adds extra blood tests to your annual Core blood test within the contract year. Each retest measures 46 key values from the Core panel, so you can see whether a change in diet, training or supplements shows up in your values. The upgrade can only be booked with an active NOA Core membership.
Only bookable together with the NOA Core membership.
At a glance
| Values | 46 values from the Core panel |
|---|---|
| Sample | Venous blood draw at an NOA Health Lab, 24 locations in 23 cities |
| Time on site | About 15 minutes |
| Fasting | Yes: no food for 12 hours beforehand, water is allowed |
| Best time | In the morning, because you come fasting |
| Results | Usually within 4 working days of the blood draw, in your dashboard |
| Doctor consultation | Can be booked separately for your retest results |
| Bookable | Only together with the NOA Core membership |
| Billing | €169 for 2 retests or €479 for 4 retests per year, runs with the membership |
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Who is it for?
The Retest upgrade is for you if you are changing something and want to know whether it shows in your values. A single blood test is a snapshot. Only several measurements over the year show which way a value is moving and whether a change in diet, training or supplements is making a difference.
When you book, you choose how many retests you want in the contract year. Each retest is a separate blood draw at an NOA Health Lab, and the results appear in your dashboard next to your previous values. If you would like to go through the results of a retest with a doctor, you can book an additional doctor consultation separately.
Common reasons
Typical reasons for a retest include:
- You have changed your diet
- You have started training or are training much more than before
- You take supplements such as vitamin D or iron
- You want to follow up a goal from your doctor consultation
- A value was outside its target range last time
- Your weight or daily routine has changed noticeably
The Retest upgrade requires an active NOA Core membership. Your retests apply to the contract year you booked them for and cannot be carried over to the next year; we will remind you in good time about any retests you have not used. A doctor consultation is not included in a retest, but you can book one separately if you need it.
What the values show
Blood count
Red and white blood cells with their main subtypes, haemoglobin, haematocrit, the red cell indices and platelets. This shows you how your blood count develops between two Core panels.
Blood lipids and blood sugar
Total, LDL, HDL and non-HDL cholesterol, triglycerides and ApoB, plus fasting glucose and HbA1c. Ratios such as triglycerides to HDL and the TyG index show how these values interact. After a change in diet or training, this is often the part you will look at most.
Liver, kidneys and electrolytes
The liver enzymes ALT, AST and gamma-GT, alkaline phosphatase, bilirubin and albumin, along with creatinine, eGFR and uric acid. The electrolytes sodium, potassium and calcium complete the picture.
Iron, vitamin D and inflammation
Ferritin, serum iron, transferrin and transferrin saturation, plus vitamin D and high-sensitivity CRP. If you supplement iron or vitamin D, this is where you see how your values develop over the year.
Thyroid and biological age
TSH as the key control value of the thyroid. NOA also calculates your biological age using the PhenoAge model after every retest, so you can follow it through the year.
What only the Core panel measures
Some values are only measured in the annual Core blood test, for example fasting insulin, cystatin C, vitamin B12, folate, cortisol and the sex hormones. Add-on packages such as Performance, Hormone Balance or Omega-3 Index are not part of a retest.
All values
White blood cells
| Value | Type |
|---|---|
| White Blood Cells (WBC) | measured |
| Neutrophils | measured |
| Lymphocytes | measured |
| Monocytes | measured |
| Eosinophils | measured |
| Basophils | measured |
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Red blood cells
| Value | Type |
|---|---|
| Red Blood Cells (RBC) | measured |
| Hemoglobin | measured |
| Hematocrit | measured |
| Mean Corpuscular Volume (MCV) | measured |
| Mean Corpuscular Hemoglobin (MCH) | measured |
| Mean Corpuscular Hemoglobin Concentration (MCHC) | measured |
| Red Cell Distribution Width (RDW) | measured |
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Platelets & clotting
| Value | Type |
|---|---|
| Platelets | measured |
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Cholesterol & blood fats
| Value | Type |
|---|---|
| Total Cholesterol | measured |
| LDL Cholesterol | measured |
| HDL Cholesterol | measured |
| Triglycerides | measured |
| Apolipoprotein B | measured |
| Non-HDL Cholesterol | calculated |
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Cholesterol ratios
| Value | Type |
|---|---|
| Triglyceride/HDL Ratio | calculated |
| Total Cholesterol / HDL Ratio | calculated |
| TyG | calculated |
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Blood sugar & insulin
| Value | Type |
|---|---|
| Glucose | measured |
| Hemoglobin A1c (HbA1c) | measured |
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Inflammation
| Value | Type |
|---|---|
| High-Sensitivity C-Reactive Protein (hs-CRP) | measured |
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Liver
| Value | Type |
|---|---|
| Alanine Aminotransferase (ALT) | measured |
| Aspartate Aminotransferase (AST) | measured |
| Gamma-Glutamyl Transferase (GGT) | measured |
| Alkaline Phosphatase (ALP) | measured |
| Total Bilirubin | measured |
| Albumin | measured |
| De Ritis ratio | calculated |
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Kidneys
| Value | Type |
|---|---|
| Creatinine | measured |
| Uric Acid | measured |
| eGFR (Creatinine) | calculated |
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Minerals & electrolytes
| Value | Type |
|---|---|
| Sodium | measured |
| Potassium | measured |
| Calcium | measured |
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Iron
| Value | Type |
|---|---|
| Ferritin | measured |
| Iron | measured |
| Transferrin | measured |
| Transferrin (Iron) Saturation | calculated |
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Vitamins
| Value | Type |
|---|---|
| Vitamin D | measured |
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Thyroid
| Value | Type |
|---|---|
| Thyroid-Stimulating Hormone (TSH) | measured |
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Risk scores
| Value | Type |
|---|---|
| PhenoAge (biological age, Levine) | calculated |
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How to prepare
You receive the same advice by email before your appointment.
- Pause supplements. No supplements until the draw, for example biotin, iron, multivitamins or omega-3. Ideally stop biotin 2–3 days beforehand. Preparations prescribed by a doctor count as medication.
- No hard training 24–48 hours before. Intense sessions distort inflammation and muscle values (hs-CRP, CK, ferritin). A gentle walk is fine.
- No alcohol 24 hours before. It affects the liver values.
- Drink plenty of water. At least 1 litre of water the day before and in the morning. Good hydration makes the blood draw easier.
- Come fasting. Eat nothing for the last 12 hours beforehand (for glucose, insulin and blood lipids). Water is allowed and even encouraged.
- Coffee only after the draw. Even unsweetened. Only once your blood has been taken.
- Medication as usual. Take it as usual.
- Rested and relaxed. Stress and rushing shortly before can affect individual values.
How it works
- Take out your NOA Core membership online and add the panels you want.
- Book a morning appointment at an NOA Health Lab near you.
- Come fasting: the blood draw takes about 15 minutes on site.
- Your values are usually in your dashboard within 4 working days.
- In the doctor consultation by video, you go through what matters for you.
Locations near you
Goes well with
- The base, always included
NOA Core membership
102 values
Who it is for: Anyone who wants to know their health status
€299 per year
- Optional
Performance
19 values
Who it is for: Endurance and strength athletes who train a lot
€149 per year
- Optional
Hormone Balance
9 values
Who it is for: Women and men with questions about hormones
€99 per year
Your appointment in two minutes
Start your NOA Core membership and book your blood draw at the location of your choice.
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