Fasting tests and 24-hour variation - so you know what is required before the test is taken


In order for you to be able to prepare in the best way before you have to submit your blood test, we have information regarding possible fasting tests or special times for sampling clearly marked in yellow on your selected test(s). Here follows a brief explanation of what fasting tests are and what is meant by diurnal variation - as well as how you know what applies to your particular test. - Health checks for increased well-being

Discover our health checks

Fasting samples

Some blood tests require fasting before sampling. Fasting means that you are not allowed to eat or drink anything for at least 10 hours before your scheduled time for sampling. However, a glass of water is fine to drink during the fast. Any medicines are taken as usual unless your doctor has given any other instructions.

What does fasting test entail?
  • Not allowed to eat or drink (except for 1 glass of water) for 10 hours before the sampling
  • You can take any medications unless you have been given other instructions by your doctor.
Example of 10-hour fast:

If you take your test in the morning at 08:00 you must not eat or drink (1 glass of water is fine) for at least 10 hours before the test, which means that the fast must start at 22:00 the day before.

Examples of tests and health checks that require fasting:
  • Triglycerides
  • Testosterone
  • Glucose
  • Health Check - Male
  • Health check - Female
  • Health check - Sports
  • Health check - Testosterone Plus
  • Health Check - Standard
  • Health check - Depression

Diurnal variation

Some samples do not require fasting but, on the other hand, they may require that sampling be done before, for example, 10:00 in the morning due to a strong diurnal variation in the value. If the test you are about to take requires a special time for taking the test, this is shown in a yellow-marked box on the test you have ordered.

Why do I have to rest for 15 minutes before sampling?

Most reference values against which the results of the analyzes are compared are obtained from people who have sat down and rested for 15 minutes before sampling. In order for your values to be correct, it is important that you plan your time so that you have the opportunity to rest for 15 minutes before sampling at your chosen sampling unit.

Medications and Supplements

When taking blood tests, it is important to be aware of how medications and supplements can affect your test results. Levaxin, a medication for thyroid problems, should be taken after the blood test to avoid inaccurate results. Hormone medications and dietary supplements can also affect the results. Contact your doctor if you are unsure of how your medications and supplements may impact your test results.

Do you have any questions?

Our support will help you with your questions, but unfortunately we cannot give any recommendations or advice regarding which test you should do or what applies to your possible medicines, to get help with these questions you need to contact your GP or health center.

Relaterade artiklar