Potassium – what do your numbers mean?
Have you had your potassium level measured and are unsure what the numbers mean? Here you will find a clear explanation of the normal range, what a high or low level can mean, and when it makes sense to get tested.
What is the normal range for Potassium?
What is the normal range for Potassium?
The normal range for potassium in the blood is typically between 3.5 and 4.6 mmol/L, depending on the laboratory's measurement methods. For plasma, the reference interval is often 3.5-4.4 mmol/L, while for serum it can be 3.6-4.6 mmol/L. In infants under 1 year, the upper limit can be up to 6 mmol/L. Variations may occur based on age, gender, and laboratory specifications. Being close to the limit values can indicate incipient imbalances that can affect muscles, nerves, and the heart, and often requires further investigation.
What does a low level mean?
A low level of potassium, also called hypokalemia, is defined as values below 3.5 mmol/L. Symptoms can include muscle weakness, fatigue, cramps, and in severe cases, cardiac arrhythmias. Causes often include loss of potassium through diarrhea, vomiting, or the use of diuretics. Particularly vulnerable groups are the elderly, people with chronic diseases, and those taking certain types of medication. Treatment focuses on finding and correcting the cause, as well as restoring potassium levels through diet or supplements. In severe cases, medical attention should be sought immediately.
What does a high level mean?
A high level of potassium, known as hyperkalemia, occurs at values above 5.0 mmol/L. Symptoms can include fatigue, muscle weakness, and in severe cases, dangerous cardiac arrhythmias, which can lead to cardiac arrest. Frequent causes include impaired kidney function, certain medications, or tissue damage. It is important to seek medical attention if hyperkalemia is suspected, especially if heart-related symptoms occur. Treatment depends on the severity and may include dietary changes, medication, or acute hospital treatment in life-threatening conditions.
Get your Potassium level tested
At Celto, you can order a blood test for Potassium directly online – without a referral from your doctor and without long waiting times. We have over 34 blood sample collection points at public hospitals throughout Denmark, and your samples are analyzed at 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 to have 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 place. The blood sample itself is taken by authorized healthcare personnel and typically only takes a few minutes.
Where you can get tested
Celto has over 34 sample collection points at public hospitals and clinics throughout Denmark. You choose the location that suits you best among our partners, and there are typically available times within a few days. Find your nearest sample collection point →
How to get your results
Your blood samples are analyzed at 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.