Be careful with licorice. This herb may also raise aldosterone levels - which may already be too high because of stress. It is also a good idea to include chromium supplementation. Since high cortisol can also lead to blood sugar imbalances, chromium is again indicated - chromium helps control blood sugar. Do not underestimate the benefits of relaxation, adequate sleep, and exercise.
Relaxation exercises can help lower excessive cortisol.
Be sure to check out the Steroid Pathway which includes a number of images that show how each hormone is produced.