Cortisol Blood Test

You can attend immediately for this test between 7 am until 1 pm Mon - Sat.
This private blood test for Cortisol in London has a guaranteed turnaround time of 1 working day or less and tests for Cortisol only. Turnaround Time
Attend Walk in Lab
Accredited Laboratory
GP Referral Included
Doctors Interpretation of your Results
Results sent via Email
Measurement of both Free Cortisol and Cortisone are useful in diagnosing patients with low-renin hypertension caused by apparent mineralocorticoid excess.

Cortisol is a steroid hormone and helps regulate metabolism, reduce inflammation and control blood sugar levels and is produced by the adrenal glands. It rises in response to stress, but it will also rise in those taking steroids (even as creams or asthma inhalers) and briefly after eating. Persistently raised cortisol levels may indicate underlying Cushing's disease. Too little cortisol may indicate adrenal deficiency and Addison’s disease. Cortisol levels naturally deplete throughout the day so a 9am sample is best.

As Cortisol decreases TSH, thereby decreasing thyroid hormone production, as well as inhibiting T4 to T3 conversion, measuring Cortisol is important.