CORTISOL IS DONE TO MEASURE THE LEVEL OF THE HORMONE CORTISOL IN THE BLOOD. THE CORTISOL LEVEL MAY SHOW PROBLEMS WITH THE ADRENAL GLANDS OR PITUITARY GLAND. CORSTISOL IS MADE BY THE ADRENAL GLANDS, WHEN THE ADRENAL GLANDS OR PITUITARY GLAND RELEASE ANOTHER HORMONE CALLED ADRENOCORTICOTROPIC HORMONE CORTISOL LEVELS GO UP. CORTISOL HAS MANY FUNCTIONS, IT HELPS THE BODY USE SUGAR (GLUCOSE) AND FAT FOR ENERGY (METABOLISM), AND IT HELPS THE BODY MANAGE STRESS.