Please read Nutrient Power by William Walsh PhD. http://www.walshinstitute.org/nutrient-power.html  "Today's emphasis on drug medications will not stand the test of time.  Drugs have helped millions of people with depression and other mental disorders but benefits usually are partial in nature and involve unpleasant or intolerable side effects. ... This book presents an advanced nutrient therapy system that can help millions of persons with mental disorders.  This approach recognizes that most humans have nutrient imbalances due to genetic and environmental factors, and these imbalances can cause mischief in various ways: (1) serotonin, dopamine, and other key neurotransmitters (NT's) are continuously produced in the brain from nutrient raw materials that may be at improper concentrations; (2) nutrient imbalances can alter epigenetic processes that govern NT activity at synapses; (3) deficiency in antioxidant nutrients can cripple the brain's protection against toxic metals . . . "