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DMT is a powerful hallucinogen, meant to be carefully administered in a calm environment to someone who has prior experience with other psychedelic drugs. The drug is relatively rare due to the lack of commercial demand and the scarcity of people with the knowledge and motivation to isolate it from plants.
The pineal gland produces dimethyltryptomine also know as DMT, marijuana stimulates the pineal gland in a small manor letting it be able to release just a little bit more dmt than it normally does this is why you vision changes slightly when using the pant. This is why the tree of life was a cannabis plant in my mind.