Xylose tolerance

This is an important test that is typically used diagnose malabsorption as the cause of persistent diarrhoea.

Venous blood
1 tests included
9 days turnaround



About Xylose tolerance

What is xylose?

D-xylose is a sugar which is used in medicine to evaluate carbohydrate absorption. A xylose tolerance test is typically used to diagnose the cause of persistent diarrhoea or fatty stool.

Why take the test?

This test measures the absorption of xylose. It is typically used to diagnose malabsorption as the cause of persistent diarrhoea or fatty stool.


What's tested

Xylose Tolerance Test

How it works



Purchase your Kit

Just order a test online and get your kit delivered right to your door unless you are ordering a COVID-19 Fit to Fly test where you will be given appointment options to attend our clinics across the United Kingdom for a nose and throat swab PCR test at the checkout stage.



Take your test and post

Follow our simple instructions to take your sample and post back the enclosed prepaid envelope to our accredited lab for processing. We also offer home or workplace visits by a qualified nurse. For COVID-19 Fit to Fly tests you must attend one of our partner clinics for our trained collection officers to take your sample. You will then have the results emailed to you.



Get results directly to your dashboard

You will receive an email notification from our medical team when your results are available on your secure personalised health dashboard.