this has been measured (in human plasma) quantitatively in the nanomolar region. what hasn't been determined is the measurement in vivo (as it's being produced).

it's commonly thought to occur in peripheral tissues rather than in cerebral tissues.

now, what is known to be produced by the pineal (aside from melatonin) is pinoline. that is more than likely what is produced when the third-eye is awakened, rather than DMT. the pineal gland simply lacks expression of the enzymes for dmt production