Squattingbear is correct, while DMT is detectable in human urine and blood, and while we know it is produced by the human body, we still are uncertain as to where this DMT production is actually occurring.
The "DMT is produced in the pineal gland" thing was a piece of conjecture by Dr. Strassman that many mistakenly take as fact.
DMT was found in the pineal body of the rat brain
http://www.ncbi.nlm.nih.gov/pubmed/23881860DMT is produced endogenously (naturally in the body) from tryptophan, which is decarboxalated (amino acid decarbixylase) to give tryptamine, this tryptamine is then methylated by the indole amine methyl transerase S-Adenosyl methionine (Sam), which becomes S-Adenosyl-L-homocysteine as it donates the methyl group, giving N-methyl-tryptamine, which is again methylated by SAM (which becomes SAH) giving N,N-dimethyltryptamine...
However, the enzymes necessary to do this are found through out the body...and its never been confirmed where endogenous DMT is being produced in the human body...
Most the tryptophan you get from diet (and it must be obtained from diet, this is why it's an "essential" amino acid) will be 5-hydroxylated to 5-hydroxy-tryptophan, which is then decarboxylated to give 5-hydroxy-tryptamine (serotonin)
( Around 90% of the human body's serotonin is found in the enterochromaffin cells in the GI tract, where it is used to regulate intestinal movements The remainder is synthesized in serotonergic neurons of the CNS... )
When This 5-hydroxy-tryptamine enters the pineal gland and is converted to N-acetyl-5-methoxy-tryptamine (meletonin), which is then cyclised to 6-methoxy-tetrahydro-beta-carboline (pinoline)
...so the pineal gland is an area for tryptamine chemistry, however the chemistry needed to produce DMT can potentially occur in other places in the body...
I hear these three unconfirmed bits of speculation constantly repeated:
·DMT is involved in the chemistry of birth and death as well as near death experiance.
·DMT plays a role in dreaming
·Spiritual, mystical, near death, and alien abduction phenomena are a result of endogenous DMT.
These are all fascinating prospects, interesting ideas, but as far as I know there's nothing to confirm any of them...
We're you implying that endogenous DMT played a role in the enlightenment of Siddhārtha Gautama as well as the crucifixion or desert wandering of Jesus Christ? And that perhaps it was the stress Siddhārtha endured through starvation and meditation which nearly killed him just before he was enlightened under the bodhi tree that caused this DMT flush? And that in the case of Christ it came through wandering through the desert or the stress of crucifixion?
I'm just trying to understand...
If I got it right, this is an interesting concept, but I doubt you will ever be able to generate any evidence for it...
-eg