endogenous DMT has been found in human blood and as far as I know human cerebral spinal fluid. I am staring at two publications that specifcally state this. As far as I know it has not been discounted. The one review paper is very recent 2005. Concerning the pineal gland yes this as far as I know is speculation. However DMT's endogenous role may be more involved in TA (trace amine) receptors and when present in high doses or administered IV or smoked or whatever swamps your 5-HT receptors and initiates psychedelic experience. However still not everything is known. Some people are proposing that endogenous DMT may function as an anxiolytic.

Although many people may not understand the complicated neurochemistry involved I would not call Dr strassman a joker. He did a very important thing which was to get permission to do a human study with a psychedelic drug the first time in many years. I respect him for that. He can speculate on DMT's role but obviously there is no solid proof yet.

that makes no sense. LSD is an organic molecule! Organic doesnt mean made in nature however! thousands of organic molecules have been synthesized by human beings that have never ever ever ever been found in nature and have a huge range of biological activity. look at the structure of LSD look at the structure of other ergot alkaloids. LSD is made by humans we synthesize it. So far no plant or fungus has ever been found to produce LSD. End of story! maybe one day it will be found but I doubt it. If your so concerned about it go try and find it.