Blood values by body system
Every blood value belongs to a system in your body: liver, thyroid, heart, hormones. Look up a value below. For each one, you get the reference range and what a deviation can mean.
58 markers Searching...
ALP (Alkaline Phosphatase)
According to the Cleveland Clinic, an enzyme is a protein in a cell that allows certain bodily processes to happen, and alkaline phosphatase is an enzyme found in many places: in the liver, the bile ducts, the bones, the kidneys, the intestines and, in pregnant women, the placenta.
ALT (Alanine Aminotransferase)
ALT, in full alanine aminotransferase, is an enzyme: according to the NVKC, the Dutch society of clinical chemists, a protein that helps cells convert one substance into another.
AST (Aspartate Aminotransferase)
AST, in full aspartate aminotransferase, is an enzyme: a protein that helps cells convert one substance into another.
Active Vitamin B12
Active Vitamin B12 measures the bioavailable form of vitamin B12 that your body can readily use.
Albumin
Albumin is the most abundant protein in the blood, produced by the liver.
ApoB (Apolipoprotein B)
Apolipoprotein B (ApoB) is the main protein on LDL and other atherogenic lipoproteins.
Bilirubin (Direct)
According to the Cleveland Clinic, bilirubin is a waste product left when old red blood cells are broken down; the liver sorts this yellow substance into bile, and bile leaves the body through the intestines.
Bilirubin (Indirect)
Indirect bilirubin is the part of your bilirubin that your liver has not yet processed.
Bilirubin (Total)
Bilirubin is a yellowish substance that, according to MedlinePlus, the patient site of the US National Library of Medicine, is made during the normal breakdown of old red blood cells.
CRP (C-Reactive Protein)
C-reactive protein (CRP) is a protein that according to the NVKC, the Dutch society of clinical chemists, is made in the liver and released by the liver into the bloodstream.
Cholesterol/HDL Ratio
Cholesterol is a substance that, according to the NVKC, the Dutch society of clinical chemists, the body uses to build tissues and organs and to make certain hormones and bile acids.
Cortisol
Cortisol is the body's primary stress hormone, produced by the adrenal glands. It regulates metabolism, immune responses, and the sleep-wake cycle.
Creatinine
Creatine is a substance that, according to the Dutch Society for Clinical Chemistry and Laboratory Medicine (NVKC), plays a part in the energy muscles need to work, and creatinine is the waste product left over when creatine is broken down in the muscles.
ESR (Erythrocyte Sedimentation Rate)
Your ESR result shows how quickly red blood cells settle towards the bottom of an upright tube. The laboratory reads that distance after exactly one hour, in millimetres per hour.
Estradiol (E2)
According to the NVKC, the Dutch society of clinical chemists, oestradiol is the main female sex hormone and belongs to the oestrogens.
FSH (Follicle Stimulating Hormone)
Follicle-stimulating hormone (FSH) is produced by the pituitary gland and plays an essential role in reproductive function. It regulates egg development in women and sperm production in men.
Ferritin
Ferritin is a protein that stores iron, so your ferritin level shows how large your iron reserve is.
Folate (Folic Acid)
Folate, also known as vitamin B9, is a water-soluble vitamin involved in cell division and DNA synthesis.
Free T3 (Triiodothyronine)
Free T3 (triiodothronine) is considered the most active thyroid hormone. It may play a key role in regulating metabolism, energy production, and body temperature.
Free T4 (Thyroxine)
Free T4 (thyroxine) is the main hormone produced by the thyroid gland. It may serve as a precursor that your body converts into the more active T3.
Free Testosterone
Free testosterone is the unbound, bioavailable form of testosterone that can directly enter cells and activate receptors. It may indicate your body's functional androgen activity.
GGT (Gamma-Glutamyl Transferase)
GGT (gamma-glutamyl transferase) is a liver and bile duct enzyme that serves as one of the most sensitive markers for hepatobiliary disorders.
Glucose (Fasting)
Fasting glucose measures the level of sugar (glucose) in your blood after an overnight fast.
HDL Cholesterol
HDL cholesterol is the amount of cholesterol carried inside the HDL particles in your blood.
What does a checkup per body system measure?
A checkup per body system bundles the blood values that belong to it. The liver checkup measures, for example, ALT, AST and GGT. The thyroid checkup measures TSH and the thyroid hormones. That gives you a focused picture instead of one single value.
We offer eight checkups, one per body system. Think of liver, kidneys, thyroid, heart and hormones. Not sure which checkup fits your question? Our test finder helps you decide in a few questions.
How do reference ranges work?
Every blood value comes with a reference range: the range most healthy people fall within. Reference ranges may vary between laboratories. That comes from differences in method and the group studied. Falling outside the range is a signal, not a diagnosis.
When you order a checkup, a BIG-registered doctor assesses your results in context. So you get more than just a number. Always discuss treatment decisions with your GP.
When should you test again?
Many values are worth measuring again after three to six months. That applies, for example, if you are following a lifestyle change or a treatment. A first test is then your baseline; the next one shows what changed.
A repeat test can also help without an ongoing change. Think of persistent symptoms, or simply tracking your values over time. Choose how often you test yourself, there is no fixed schedule.
Frequently asked questions about blood values
- Which blood values are normal?
- That differs per value and per laboratory. Your reference range depends on several things: your age, your sex and the method used. Look up the value in the overview above and check its range. Always compare that range with your own result.
- Do I need a referral for a checkup?
- No, you don't need a referral from your GP for a checkup with us. You order the checkup that fits your question yourself. After the blood draw, a BIG-registered doctor assesses your results.
- Can a checkup diagnose a disease?
- A checkup is not a diagnostic test for one specific disease. An abnormal value can have several causes and often calls for follow-up testing. For persistent symptoms, your GP is the best next step.
- How quickly do I get my results?
- Your results are usually in your account within 2 working days of the blood draw, often the next day. Some markers take longer. You see your values with explanation in your account, assessed by a doctor.
Reference ranges may vary between laboratories. When you order a test, a BIG-registered doctor assesses your personal results in context. For treatment decisions, discuss your results with your GP.