Cortisol Evening Sample Test
- Category
- Hormones
- Sample
- Blood sample taken from a vein in your arm
- Reports () Terms & Conditions Report time varies with time of sample collection.
- In 2 days
- Fasting
- No Fasting
- Age
- 5+ Years
What Is This Test?
Measures cortisol in an evening/late-day sample, when levels are normally low.
Why this test is performed?
A high evening cortisol suggests loss of the normal daily rhythm, as seen in Cushing's syndrome.
Who should take this test?
Symptoms suggesting hormonal imbalance — weight change, fatigue, BP changes, growth problems — usually as advised by a doctor.
Test Preparation
No fasting is needed. Give the sample in the evening at the time advised by your doctor (usually 4–8 PM). Tell your doctor about any steroid medicines.
Medical disclaimer · for information only, not medical advice
This article is for general information and education only. It is not medical advice, does not create a doctor–patient relationship, and is not a substitute for consultation with a qualified doctor who has assessed your individual situation. Never delay seeking medical advice because of something you have read here.
In a medical emergency, call 112, or 108 for an ambulance where that service operates, or go to your nearest emergency department. If you are in mental health distress, Tele-MANAS is free and available 24×7 on 14416.
Read our Editorial Policy and Medical Review Process.
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Frequently asked questions
Cortisol follows a daily rhythm — highest in the early morning and lowest late at night — so the time of collection changes how results are interpreted.
No fasting is needed. Give the sample in the evening at the time advised by your doctor (usually 4–8 PM). Tell your doctor about any steroid medicines.
Blood sample taken from a vein in your arm.
Usually within 15–39 hours after the sample reaches the lab. You will receive the report online.
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