Blood Sugar (Glucose) – what do your numbers mean?
Have you had your Blood Sugar (Glucose) level measured and are unsure what the numbers mean? Here's a clear explanation of the normal range, what a too high or too low level can mean, and when it makes sense to get tested.
What is the normal range for Blood Sugar (Glucose)?
What is the normal range for Blood Sugar (Glucose)?
The normal range for blood sugar (glucose) varies depending on whether the measurement is fasting or not. For individuals without diabetes, fasting blood sugar typically ranges between 4 and 6 mmol/L. After a meal, the level can temporarily rise to approximately 8 mmol/L. For fasting blood sugar exceeding 6.1 mmol/L, diabetes may be suspected, and values above 7.0 mmol/L indicate a high probability of diabetes. It is important to note that there may be slight variations in reference intervals depending on the laboratory's analytical methods, age, and gender. If blood sugar levels are close to the limit values, it may be a sign of prediabetes or other metabolic disorders, and further investigation is recommended.
What does a low level mean?
A low blood sugar level, also known as hypoglycemia, is often defined as values below 3.9 mmol/L. Symptoms can include sweating, trembling, dizziness, confusion, and in severe cases, unconsciousness. Hypoglycemia is most common in people with diabetes who have taken too much insulin or other blood sugar-lowering medication. It can also occur with fasting, excessive physical activity, or rare conditions such as insulin-producing tumors. Particularly vulnerable groups include people with diabetes and the elderly. If you experience symptoms of low blood sugar, you should immediately consume fast-acting carbohydrates such as juice or sugar. If the symptoms do not improve, or if they worsen, you should seek medical attention.
What does a high level mean?
A high blood sugar level, also known as hyperglycemia, is often defined as fasting values above 7.0 mmol/L or values above 11.0 mmol/L after a meal. Symptoms can include increased thirst, frequent urination, fatigue, and in severe cases, ketoacidosis, which can be life-threatening. Hyperglycemia is often caused by insufficient insulin production or action, as seen in diabetes. Other causes may include stress, infections, or certain medical conditions. Individuals with persistently high blood sugar should contact their doctor for treatment adjustment. If symptoms are severe, or if complications such as ketoacidosis occur, it is important to seek urgent medical attention.
Get your Blood Sugar (Glucose) level tested
At Celto, you can order a blood test for Blood Sugar (Glucose) directly online – without a referral from your doctor and without long waiting times. We have over 34 sample collection sites at public hospitals throughout Denmark, and your samples are analysed in the same accredited laboratories used by the rest of the healthcare system. You will receive your results directly on sundhed.dk, just like all other blood tests from the public system.
How it works
When you order a blood test from Celto, you choose which markers you want tested – no doctor's referral necessary. After your purchase, you will receive an email with a link to our booking system, where you choose time and location. The blood test itself is taken by authorised healthcare personnel and typically only takes a few minutes.
Where you can get tested
Celto has over 34 sample collection sites at public hospitals and clinics across Denmark. You choose the location that suits you best among our partners, and there are typically available appointments within a few days. Find your nearest sample collection site →
How you get your results
Your blood samples are analysed in the same laboratories used by your own doctor and the rest of the healthcare system, with exactly the same quality and the same tests. You will receive your results directly on sundhed.dk within a few working days, and Celto will also send an easy-to-understand review of your values so you know what the numbers mean.