after 55 minutes into this new interview
Serotonin for example is phylogenetically the oldest neurotransmitter - by old I mean really old. there's evidence of fungal-like organisms that had these kind of things 3.3 , 3.8 billion years ago....
These were not mushrooms - this was much before mushrooms. But Tryptophan was out there. And one of these most ancient amino acids for whatever that's worth. I don't know....
Dennis McKenna
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