...and indeed fascinating material. Don't know what you mean by "woo territory". I'm results oriented. What ever works!
And there seems to be solid science verifying the positive effects of Ayahuasca as in this story from "National Geographic":
http://www.nationalgeographic.com/adventure/0603/features/peru2.html
Only in the past decade, and then only by a handful of researchers, has ayahuasca begun to be studied.
At the vanguard of this research is Charles Grob, M.D., a professor of psychiatry and pediatrics at UCLA's School of Medicine. In 1993 Dr. Grob launched the Hoasca Project, the first in-depth study of the physical and psychological effects of ayahuasca on humans. His team went to Brazil, where the plant mixture can be taken legally, to study members of a native church, the União do Vegetal (UDV), who use ayahuasca as a sacrament, and compared them to a control group that had never ingested the substance. The studies found that all the ayahuasca-using UDV members had experienced remission without recurrence of their addictions, depression, or anxiety disorders. In addition, blood samples revealed a startling discovery: Ayahuasca seems to give users a greater sensitivity to serotoninone of the mood-regulating chemicals produced by the bodyby increasing the number of serotonin receptors on nerve cells.
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