I've recently read that schizophrenics emit through their sweat ducts a certain chemical called trans-3-methyl-hexanoic acid. This agent also (probably unnoticably to most) causes them to smell differently to others as it is an aromatic chemical. One source suggested that this chemical may be a vestige of phermones residual from a time when we may have relied on these for comunication with the psychoactive effect being routed to the possibility that persons who emit this chemical are perceiving a distorted reality because they are reacting to their own phermones. This is, of course, speculative. I have so far been unable to locate much information regarding this chemical, what is known about it, and if and how it affects the neurochemistry of persons diagnosed with schizophrenic disorders. If anyone knows about this, or can refer me to a resource wherein I can discover more please send it along!