FYI, DMT production in the human brain is not supported by any scientific studies. There were studies that found negligible amounts in rat brains, but those have not been successfully duplicated. So it's possible that it's there, but it's commonly stated as a fact when in reality, we just don't know.
DMT production (or even existence) in the brain hasn't been conclusively demonstrated, but it has been found in other human tissue, so it is produced somewhere in the body. Dr. Rick Strassman (who has written books on specifically this subject) seems to make a good case for its production in the brain, but you're right that it isn't accepted as scientific fact yet.
