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Medical Laboratories

Morning Serum Cortisol Test

Morning Serum Cortisol Test (AM)

Measure early morning cortisol levels to evaluate your body's stress response and adrenal gland function, helping accurately diagnose energy levels and metabolic disorders for better health.

Trusted medical contentUpdated: 25-04-2026Views: 121LHL-3075

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Morning Serum Cortisol Test | Morning Serum Cortisol Test (AM)

Home Service Available

Service typeLaboratory test (Blood)

Duration10-15 minutes

Fasting / preparationFasting is not required

Home serviceAvailable

Medical notice: this information is for education and service understanding. It is not a diagnosis or a recommendation for an unnecessary procedure.

About this service

A highly sensitive quantitative biochemical assay measuring the basal level of Cortisol, a primary glucocorticoid hormone, in blood serum. The biological sample is strictly extracted in the early morning, characteristically between 7:00 AM and 9:00 AM, to align with the hormone's natural physiological fluctuations. Cortisol secretion is tightly regulated by a distinct circadian rhythm; it achieves its peak concentration in the early morning hours upon waking, and subsequently undergoes a gradual decline throughout the daylight hours, culminating at its physiological nadir near midnight. The early morning baseline measurement provides the most diagnostically relevant and accurate representation of adrenal cortex functionality, playing a vital role in identifying hypercortisolism (e.g., Cushing's syndrome) or hypocortisolism (e.g., Addison's disease).

Purpose Test

Diagnosing Cushing’s syndrome (hypercortisolism) through elevated morning levels, often followed by confirmatory tests such as the dexamethasone suppression test.
Assisting in the diagnosis of primary (Addison’s disease) or secondary adrenal insufficiency, where morning levels are low and unable to reach normal peaks.
Evaluating the function of the hypothalamic-pituitary-adrenal (HPA) axis in general.
Monitoring patients receiving long-term corticosteroid therapy (e.g., prednisone) to assess adrenal suppression.

Recommended groups

Patients showing signs of cortisol excess (Cushing’s syndrome): central weight gain, moon face, buffalo hump, high blood pressure, new-onset diabetes.
Patients showing signs of cortisol deficiency (adrenal insufficiency): persistent severe fatigue, low blood pressure, weight loss, hyperpigmentation.
Patients with tumors of the pituitary or adrenal glands.
Patients receiving long-term corticosteroid therapy.

Symptoms indicative

Rapid weight gain with fat concentration in the abdomen and face (moon face) and neck (buffalo hump).
General weakness and severe fatigue that does not improve with rest.
Unexplained high blood pressure.
Long purple stripes on the abdomen (stretch marks).
Low blood pressure, dizziness, and strong craving for salt.

Normal Levels

Morning (7-9 AM): 5 - 25 micrograms per deciliter (µg/dL) or 138 - 690 nanomoles per liter (nmol/L).
Evening (around 4 PM): the level is approximately less than half of the morning level.
Midnight: it is at its lowest level.
Abnormally high in the morning: indicates possible cortisol excess (Cushing’s syndrome).
Abnormally low in the morning: indicates possible adrenal insufficiency.

What is included?

✓Cortisol (a.m) (Serum) Test
✓Consultation for results interpretation with an endocrinologist.
✓Personal support services from Lahalak

Conditions and notices

Fasting is not required
• The sample should be drawn early in the morning, ideally between 7 and 9 AM, approximately one hour after waking.
• Fasting is not usually required, but the laboratory should be informed if you are fasting.
• Intense physical or psychological stress should be avoided before the test.
• The physician and laboratory should be informed of all medications you are taking, especially steroids (pills, inhalers, creams), birth control pills, and anti-seizure medications.
• The sample is collected in a serum tube (red or yellow cap).

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Important Notice:

Content on LahaLak is provided for educational purposes only. It is not a medical diagnosis, prescription, or substitute for consulting a qualified clinician. Medical decisions should not be made from this content alone.

Content reviewed according to the LahaLak Quality Charter.Editorial Policy & Medical Standards

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Medical Laboratories

Morning Serum Cortisol Test

Morning Serum Cortisol Test (AM)

Measure early morning cortisol levels to evaluate your body's stress response and adrenal gland function, helping accurately diagnose energy levels and metabolic disorders for better health.

Trusted medical contentUpdated: 25-04-2026Views: 121LHL-3075

View service availability

Home Service Available

Service typeLaboratory test (Blood)

Duration10-15 minutes

Fasting / preparationFasting is not required

Home serviceAvailable

Medical notice: this information is for education and service understanding. It is not a diagnosis or a recommendation for an unnecessary procedure.

About this service

Purpose Test

Diagnosing Cushing’s syndrome (hypercortisolism) through elevated morning levels, often followed by confirmatory tests such as the dexamethasone suppression test.
Assisting in the diagnosis of primary (Addison’s disease) or secondary adrenal insufficiency, where morning levels are low and unable to reach normal peaks.
Evaluating the function of the hypothalamic-pituitary-adrenal (HPA) axis in general.
Monitoring patients receiving long-term corticosteroid therapy (e.g., prednisone) to assess adrenal suppression.

Recommended groups

Patients showing signs of cortisol excess (Cushing’s syndrome): central weight gain, moon face, buffalo hump, high blood pressure, new-onset diabetes.
Patients showing signs of cortisol deficiency (adrenal insufficiency): persistent severe fatigue, low blood pressure, weight loss, hyperpigmentation.
Patients with tumors of the pituitary or adrenal glands.
Patients receiving long-term corticosteroid therapy.

Symptoms indicative

Rapid weight gain with fat concentration in the abdomen and face (moon face) and neck (buffalo hump).
General weakness and severe fatigue that does not improve with rest.
Unexplained high blood pressure.
Long purple stripes on the abdomen (stretch marks).
Low blood pressure, dizziness, and strong craving for salt.

Normal Levels

Morning (7-9 AM): 5 - 25 micrograms per deciliter (µg/dL) or 138 - 690 nanomoles per liter (nmol/L).
Evening (around 4 PM): the level is approximately less than half of the morning level.
Midnight: it is at its lowest level.
Abnormally high in the morning: indicates possible cortisol excess (Cushing’s syndrome).
Abnormally low in the morning: indicates possible adrenal insufficiency.

What is included?

✓Cortisol (a.m) (Serum) Test
✓Consultation for results interpretation with an endocrinologist.
✓Personal support services from Lahalak

Conditions and notices

Fasting is not required
• The sample should be drawn early in the morning, ideally between 7 and 9 AM, approximately one hour after waking.
• Fasting is not usually required, but the laboratory should be informed if you are fasting.
• Intense physical or psychological stress should be avoided before the test.
• The physician and laboratory should be informed of all medications you are taking, especially steroids (pills, inhalers, creams), birth control pills, and anti-seizure medications.
• The sample is collected in a serum tube (red or yellow cap).

Service availability

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Labeeb & Search Tools

Let us help you

Use Labeeb smart tools to understand reports related to (Medical Laboratories), or search the platform directory directly.

Browse services alphabetically A-Z

LahaLak is here to help

Didn’t find the service?

We can help request the service and prepare your inquiry, or you can ask Labeeb to guide you to the most suitable category or service.

Phone call

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Your opinion matters

Was this content helpful?

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Important Notice:

Content reviewed according to the LahaLak Quality Charter.Editorial Policy & Medical Standards

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