Cortisol - free (urine)

This is an important test to help diagnose Addison’s and Cushing’s disease.

1 tests included
8 days turnaround



About Cortisol - free (urine)

What is cortisol?

Cortisol is a glucocorticoid, a type of steroid hormone, produced by the adrenal glands. It is involved in the stress response, metabolism and immune function. As a result of cortisol’s role in the fight-or-flight (stress) response, it is often referred to as the stress hormone. Hormones are chemical messengers used by the body to respond to internal and external influences. The activity of hormones must be finely regulated to produce the desired physiological effect.

This regulation is typically coordinated by complex interactions between several different hormones. Both excessive production and a deficiency in the production of steroid hormones can cause ill health. Excess levels of glucocorticoids may cause immunosuppression, whereas low levels may cause the release of inflammatory molecules. Disorders related to glucocorticoids include Addison’s and Cushing’s disease. Cushing’s disease is a result of too much cortisol, whereas Addison’s disease, also known as adrenal insufficiency, occurs when the adrenal glands do not produce enough cortisol.  

Why take the test?

This test measures the level of cortisol in the urine over a period of 24 hours and can be used to help diagnose Addison’s and Cushing’s disease.


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.