Should You Get an Adrenal Function Test to Check Your Cortisol Levels? Are you tired all the time? Do you feel run down or fatigued? Do you NEED Coffee to get going in the morning, are you feeling stressed, have insomnia, have a chronic illness, or are you just not feeling as energetic as you used to feel? These are all symptoms of adrenal gland dysfunction. And adrenal dysfunction can be a result of either high or low cortisol levels.If you do have adrenal dysfunction, an Adrenal Function Test , which is the same as a cortisol test, is the ONLY way to accurately find out your cortisol levels. And a salivary adrenal test, like this one, is the best and most accurate cortisol test on