No biological or genetic origin

“Despite more than two hundred years of intensive research, no commonly diagnosed psychiatric disorders have proven to be either genetic or biological in origin, including schizophrenia, major depression, manic-depressive disorder, the various anxiety disorders, and childhood disorders such as attention-deficit hyperactivity.

At present there are no known biochemical imbalances in the brain of typical psychiatric patients—until they are given psychiatric drugs.”

— Dr. Peter Breggin, Psychiatrist