Cortisol AM & PM Test – Cortisol Levels in California

What this test is

Cortisol is a hormone produced by the adrenal glands that plays a role in metabolism, immune response, and stress management. This test measures the amount of cortisol in your blood at two different times of day to see how its levels change.

What it measures

• Cortisol — a hormone that helps regulate metabolism, immune response, and stress

What the test involves

This test requires a standard blood draw. A healthcare professional will collect a sample of your blood, typically from a vein in your arm.

Why it is often ordered

Clinicians may order this test to help evaluate conditions related to the adrenal glands or to investigate symptoms that might be associated with too much or too little cortisol. It can provide insight into the body's stress response and hormonal balance.

Preparation

You will need to follow specific instructions provided by the laboratory before your blood draw. It is important to adhere to these guidelines for accurate results.

How results are reported

Your results will indicate the measured levels of cortisol in your blood for both the morning and afternoon collections. Reference ranges, which help interpret these levels, are specific to each laboratory and may vary.

Before you go

• Specific preparation instructions
• Fasting requirements
• Timing of sample collection