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Cortisol (Free) Urine Test
Cortisol (Free) Urine Test
Cortisol (Free) Urine Test

Cortisol (Free) Urine Test

A 24-hour urine test to measure the levels of cortisol in your body - to help investigate Cushing's syndrome or Addison's disease.
Urine sample 2 biomarkers included 8 working days turnaround

What's included?

Biomarker profiles

  • Adrenal Hormones
  • Sample details

Adrenal Hormones (1 Biomarker)

Sample details (1 Biomarker)

Special instructions

Do not take biotin supplements for 2 days prior to this test. If you are taking prescribed biotin you should discuss this with your doctor. Your result could be affected by corticosteroid medication (e.g. prednisolone). Ask your doctor whether you should stop before testing. Take care to collect all the urine that you pass in 24 hours in the container.
Cortisol is a steroid hormone, produced by the adrenal glands. It is vital for survival given its role in various bodily functions such as immunity, regulating blood pressure and releasing insulin for blood sugar maintenance. Cortisol has been termed 'the stress hormone' because it is secreted in higher quantities during the body's 'fight or flight' response to stress, and is responsible for several stress-related changes in the body.

A cortisol urine test tends to be more comprehensive than any other cortisol test as it measures the total amount of cortisol excreted into the urine over a 24-hour period whereas blood or saliva tests only measure cortisol levels at a particular time of day. Some people also find blood tests to be stressful and since the body releases more cortisol during times of stress, the results may be affected.

This test establishes the levels of cortisol in the urine and can help identify Cushing's syndrome, which is caused by too much cortisol, or Addison's disease, which is caused by damage to the adrenal glands and is associated with too little cortisol.

Dr Sam Rodgers MBBS, MRCGP

Why take this test?

  • You want to investigate to see whether you could have Cushing's syndrome or Addison's disease
  • You are worried your stressful lifestyle is damaging your health

How it works

  • Take the test

    Collect your sample at home, visit a partner clinic, or we can even send a nurse to you.
  • Post your sample

    Send your sample back on the same day you take it in the freepost pack to our laboratory.
  • Get your results

    View your results with doctor's advice on your personal dashboard.
Laboratories you can trust

Laboratories you can trust

Trusted by the NHS and private clinics alike, you can be sure of the highest testing standards from our fully accredited partner laboratories.

Expert interpretation <br>
of your results

Expert interpretation
of your results

One of our team of doctors will review your results and give you personalised advice based on your medical history, lifestyle and health and fitness goals.

Your personal<br>
health centre

Your personal
health centre

Discover the easy way to track your health through our online portal, View your results with doctor's advice, monitor any changes over time and see the improvements you can make to your health with simple lifestyle changes.

Questions? Let us help

Questions? Let us help

Our customer care team is on-hand to help you find the test that's right for you. Get in touch via phone, live chat or email.

What our customers say

We ask every Medichecks customer about their experience - read what they have to say


Our tests are not a substitute for seeing your doctor, especially if you are suffering symptoms. Our doctors will interpret your results based on the information you have provided, but will not diagnose, consult or provide any treatment. You will be advised to see your doctor for any necessary follow-up action.