Description
Why It’s Done:
The Cortisol Serum (Morning Sample) Test is performed for the following reasons:
• Assess adrenal function: It helps evaluate how well the adrenal glands are working and whether they are producing the right amount of cortisol. Abnormal cortisol levels may indicate adrenal gland dysfunction.
• Diagnose disorders related to cortisol production: The test is used to help diagnose conditions such as:
o Cushing’s syndrome: A condition where the body produces too much cortisol, leading to symptoms such as weight gain, high blood pressure, thin skin, and muscle weakness.
o Addison’s disease: A condition where the adrenal glands do not produce enough cortisol, leading to symptoms such as fatigue, weight loss, low blood pressure, and salt cravings.
• Evaluate response to stress: Cortisol is known as the stress hormone, and the morning peak is critical for assessing the body’s response to normal daily stressors.
• Monitor treatment for adrenal disorders: For individuals being treated for adrenal disorders, this test can help track the effectiveness of treatment.
• Investigate unexplained symptoms: Symptoms such as chronic fatigue, muscle weakness, unexplained weight loss, or frequent infections may warrant this test to rule out issues with cortisol production.
Preparation:
• Timing: It is crucial to collect the blood sample in the morning, typically between 6 a.m. and 8 a.m., when cortisol levels are naturally highest. This timing is critical for accurate results.
• No fasting required: The test typically does not require fasting, so you can eat and drink as usual before the test.
• Medications: Inform your doctor about any medications you are taking, as certain drugs (such as oral contraceptives, steroids, certain antidepressants, or epinephrine) may affect cortisol levels.
• Avoid stress: As cortisol is a stress hormone, try to avoid any emotional or physical stress before the test, as this can artificially raise cortisol levels.
• Exercise: It’s advised to avoid intense exercise or strenuous physical activity on the morning of the test, as this may also affect cortisol levels.
• Sleep patterns: Since cortisol levels naturally follow a diurnal rhythm, try to ensure you get a good night’s sleep prior to the test, as lack of sleep can affect cortisol production.
