General Information About the Test
ACTH is an important hormone secreted by the pituitary gland in the brain, stimulating the adrenal glands to produce cortisol. This test is performed to diagnose dysfunction of the pituitary or adrenal glands (such as Cushing's syndrome, Addison's disease) by measuring the ACTH level in the blood. It is a critical laboratory parameter for understanding the body's stress response and metabolic balance.
Test Process and Preparation
ACTH test measurement process and the rules patients need to pay attention to.
How is the ACTH test performed?
It is performed via a standard blood draw from a vein in the arm. Since hormone levels fluctuate throughout the day, timing is important.
When should the blood be drawn?
Cortisol and ACTH levels are generally at their highest in the early morning (between 08:00 - 10:00). Therefore, unless the doctor specifies otherwise, it is recommended to perform the test in the morning.
What should be considered before the test?
A 10-12 hour fasting period is usually required before the test. In addition, since stress, vigorous physical activity, or sleep irregularities can affect test results, a relaxed and calm routine should be followed before the test.
The information on this page is for informational purposes only. The results of medical tests must be evaluated by specialist physicians.
