thisthis information is considered educational only and is not an attempt to diagnose or treat any disease.
The brain is not a separate entity from the rest of the body but is an organ like any other organ system. It is subject to the same biochemical activities of the rest of the body. Cortisol causes havoc in this organ (the brain) by causing anxiety, mood disorders, sleep problems and depression. Reducing stress = reducing cortisol = better moods.
Psychotropic drugs can be a vital help for some people but is not the end of the road for many people, nutrition offers a more complete solution for these issues.