Fish odour syndrome

This is an important test used to diagnose trimethylaminuria (fish odour syndrome).

2 tests included
43 days turnaround



About Fish odour syndrome

What is fish odour syndrome?

Trimethylaminuria, commonly known as fish odour syndrome, is a disorder in which the body cannot process trimethylamine due to an abnormal flavin-containing monooxygenase 3 enzyme (FMO3). The inability to break down trimethylamine means that it is released in urine, breath and sweat, producing a strong fishy odour.

Most cases of this disorder are genetically inherited and cannot be cured, however, there are documented cases of liver damage or dietary problems resulting in the same symptoms. Why take the test? This test measures the amount of trimethylamine and its healthy breakdown product, trimethylamine oxide, to check for problems in trimethylamine metabolism. It is used to diagnose trimethylaminuria (fish odour syndrome).

Why take this test?

It is used to diagnose trimethylaminuria (fish odour syndrome).

What's tested


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.