This document discusses the use of nutrient therapy as a complementary treatment in psychiatry. It notes that the author has clinical experience treating over 10,000 patients with various mental health conditions through biochemical testing and individualized nutrient programs. The database findings show striking biochemical differences between mental illness populations and controls. The brain requires nutrients for neurotransmitter synthesis, and imbalances can result in psychiatric problems. Common imbalances seen include zinc deficiency, methylation disorders, and toxic metal overloads. Individualized nutrient therapy aimed at normalizing brain chemistry through correcting deficiencies and overloads has led to positive outcomes for conditions like ADHD, autism, and schizophrenia according to most families.