Cortisol Blood Test, from our experts to you.
Dr Sam Rodgers MBBS, MRCGP

Chief Medical Officer meet our doctors

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What is
cortisol?

Cortisol is a steroid hormone, produced by the adrenal glands. Cortisol's role in stress is well known. More is released during the body's fight or flight response to danger and leads to changes in the body as it prepares to deal with the perceived threat. Modern lives with constant stimulation, work, and social pressures can lead to persistently high cortisol. </p><p>Although cortisol is associated with stress, it is also important for many other functions including your immune function, blood pressure regulation, and controlling insulin to maintain blood sugar levels.


What can I learn
from this test?

Our Cortisol Blood Test will help you identify whether your stress levels are abnormally high. Stress is not just mental and emotional; it can be physical too. Athletes who overtrain can have high levels of cortisol. Abnormal cortisol levels are seen in conditions like Cushing’s syndrome, which is caused by too much cortisol, and Addison’s disease, which is caused by damage to the adrenal glands. This test may provide clues but is not diagnostic for these conditions.


When should I
take this test?

Take our Cortisol Blood Test in the morning to measure your cortisol levels close to waking. This is when cortisol levels are highest as your body prepares for the day ahead.


What's included?

Adrenal hormones
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Cortisol Cortisol is a stress hormone produced by the adrenal glands. It is vital to survival given its role in functions such as immunity, regulating blood pressure and releasing insulin for blood sugar maintenance.

How to prepare
for your test

Special instructions

Prepare for your Cortisol Blood Test by following these instructions. Please take your sample before 10am. Hormonal contraception can affect this test, taking a break from this and using barrier contraception will give more accurate results. Corticosteroid medication can affect this test, ask your doctor whether to stop before testing. Do not take biotin supplements for two days before this test, discuss this with your doctor if it is prescribed.


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