Cortisol (AM/PM)
Cortisol is a stress hormone produced by the adrenal glands. This test measures cortisol levels at specific times of day to evaluate adrenal function and diagnose conditions like Cushing's or Addison's disease.
12 hours
Turnaround
Blood
Sample
What the Cortisol (AM/PM) test tells you
Cortisol is the main steroid hormone made by the outer layer of the adrenal glands, which sit above each kidney. Its release is directed by the pituitary gland, and in most people it follows a strong daily rhythm: output climbs in the hours before waking, is at its highest shortly after you wake, and falls away through the day to its lowest point in the middle of the night. Because a single reading means very little without knowing where in that rhythm it was taken, this test collects a morning and a later sample so the shape of the day can be seen. The timing of each draw is not a matter of convenience — it is the measurement itself.
Cortisol governs a great deal: how the body handles sugar and protein, blood pressure, salt and water balance, immune activity, and the response to stress or illness. Losing the normal day-to-night fall is often the earliest measurable sign that something is wrong. Levels that stay high later in the day raise the possibility of excess cortisol production, while a morning value that fails to rise raises the possibility of an underactive adrenal gland or a pituitary problem. Neither pattern is a diagnosis on its own.
Almost anything about a person's day can move cortisol: acute illness, pain, injury, poor sleep, night-shift work, alcohol, pregnancy, the oestrogen in some contraceptives, and steroid medicines in any form — including inhalers, nasal sprays, skin creams, eye drops and joint injections, which people routinely forget to mention. This is why an abnormal result is treated as a prompt for further work rather than an answer, and why your doctor will usually follow it with dedicated stimulation or suppression testing before concluding anything.
Ordered when symptoms such as unexplained weight gain, fatigue, muscle weakness, or abnormal blood pressure suggest adrenal dysfunction.
Two timed samples show whether cortisol rises and falls as it should, which a single reading cannot.
Levels that stay high later in the day are one of the earliest signals of overproduction.
A morning value that fails to climb prompts your doctor to investigate an underactive adrenal or pituitary gland.
Fatigue, weight change, blood pressure shifts and muscle weakness have many causes; this test helps decide whether the adrenals are among them.
Reasons your doctor may request the Cortisol (AM/PM) test
Your doctor may order this test for any of the reasons below. Some are routine checks, others follow specific symptoms or an earlier result.
Signs of too much cortisol
Weight gain around the trunk and face with thin skin, easy bruising or purple stretch marks.
High blood pressure or high blood sugar that is difficult to explain or control.
Signs of too little cortisol
Unexplained fatigue, muscle weakness or dizziness on standing.
Darkening of skin creases, salt craving, nausea or unexplained weight loss.
After steroids or an imaging finding
Follow-up after a long course of steroid treatment has been stopped.
An adrenal or pituitary abnormality found incidentally on imaging.
No fasting window — pick any slot that suits you, online or on WhatsApp.
A DHA-licensed nurse collects your sample at home or in the office — free home collection.
A physician-reviewed, easy-to-read report lands securely by WhatsApp and email.
Cortisol is a stress hormone that follows a daily rhythm (higher in the morning).
Ranges are a guide — your physician interprets your result alongside your symptoms and history.
What a higher result can point to
- Cushing's syndrome from an adrenal or pituitary tumour, or from a hormone-producing tumour elsewhere.
- Acute physical stress such as infection, injury, surgery or severe pain.
- Depression, poorly controlled diabetes, alcohol excess or chronic sleep disruption, which blunt the normal rhythm.
- Pregnancy or oestrogen-containing contraceptives, which raise the carrier protein cortisol travels on.
- Steroid medicines taken in a form the assay also detects.
What a lower result can point to
- Addison's disease, in which the adrenal cortex is damaged, most often by an autoimmune process.
- Pituitary disease reducing the signal that tells the adrenals to produce cortisol.
- Suppression after prolonged steroid treatment, where the adrenals have become inactive and need time to recover.
- Adrenal damage from bleeding, from infection such as tuberculosis, or from the spread of cancer.
- Congenital adrenal disorders present from birth.
These are possibilities, not diagnoses. A single value outside the reference range is interpreted alongside your symptoms, history and other tests — your doctor decides what it means for you.
What this test cannot tell you
- A single pair of samples reflects one day, and illness, pain, injury or a broken night can shift both values.
- Steroid medicines in any form — inhaled, nasal, topical, eye drops and joint injections included — can suppress your own output or be detected by the assay, and are easily forgotten when listing medicines.
- Blood cortisol includes the hormone bound to its carrier protein as well as the free fraction, so pregnancy and oestrogen therapy raise the total without changing what is biologically active.
- Abnormal results are a starting point; suppression or stimulation testing is needed before any conclusion is drawn.
Risks of the blood draw
- Mild bruising or brief soreness where the needle went in.
- Occasional lightheadedness, which settles after a few minutes of rest.
- Bleeding or infection at the site, which is rare with sterile single-use equipment.
- 1Cortisol follows a daily rhythm, so the time the sample was taken is as important as the value itself.
- 2The morning sample is collected shortly after waking and the later sample at the hour your doctor specifies.
- 3Loss of the day-to-night fall is often more informative than either single value.
- 4Illness, stress, sleep loss and shift work all move the result and should be mentioned.
- 5Abnormal findings lead to further dedicated testing rather than to a diagnosis.
Frequently Asked Questions
Everything you need to know about the Cortisol (AM/PM) test. Can't find what you're looking for?
Talk to our team→Cortisol is meant to be at its highest shortly after waking and much lower later in the day. A single value cannot show that fall, and it is the fall itself — or its absence — that carries most of the information.
It can. Cortisol responds to stress within minutes, so rushing to the appointment or being anxious about the needle can lift a morning reading. Arriving early and sitting quietly beforehand reduces that effect.
Yes, and they are easy to forget. Steroid absorbed from inhalers, sprays, creams, drops and injections can suppress your own cortisol production or be picked up by the assay. Bring a complete list so the result can be read correctly.
Not on its own. Many everyday things shift cortisol, so an abnormal pair of samples is a signal to look further. Your doctor will usually arrange a suppression or stimulation test, which examines how the glands respond rather than just where the level sits.
Cortisol is a stress hormone produced by the adrenal glands. This test measures cortisol levels at specific times of day to evaluate adrenal function and diagnose conditions like Cushing's or Addison's disease.
Ordered when symptoms such as unexplained weight gain, fatigue, muscle weakness, or abnormal blood pressure suggest adrenal dysfunction.
No, fasting is not required for the Stress Hormone (AM / PM) test, so you can eat and drink normally beforehand.
The Stress Hormone (AM / PM) test uses a blood sample, collected quickly by our DHA-licensed phlebotomist with minimal discomfort.
Results for the Stress Hormone (AM / PM) test are typically ready within 12 hours. You will receive a secure digital report, and your Smart Report highlights anything outside the normal range.
The Stress Hormone (AM / PM) test is AED 140, which includes free home sample collection and a physician-reviewed report. You can also build a custom panel and pay only for the markers you choose.
Yes. A DHA-licensed phlebotomist can collect your sample at home or the office anywhere in Dubai at no extra cost, 7 days a week. See how it works.
It is commonly chosen by adults. If you are not sure it is right for you, our care team is happy to advise.
Add the Stress Hormone (AM / PM) test to your cart and complete the short booking wizard, choosing home collection or a lab visit. Guest checkout lets you book without creating an account.
Yes. It is processed at our EIAC-accredited laboratory (ISO 15189:2022) under DHA license 0046381 and verified by board-certified pathologists.
Every report includes reference ranges and plain-language notes. If you have questions, our care team can arrange a clinician review — just get in touch.
Absolutely. Add it to a curated health package or bundle it with any of our 160+ biomarkers, often from a single sample in one visit.