Bryan Johnson: I Just Took the Most Powerful Dose of DMT in the World... Here's What It Was Like

TL;DR

Bryan Johnson describes his 5-MeO-DMT experience as the most transformative event of his life, pursuing it as a longevity and brain-rejuvenation experiment.

Key Points

• 1.Johnson took 5-MeO-DMT, claiming it is 5–10x more powerful than DMT. He administered 9mg intramuscularly plus 18mg vaporized; the experience hit within 10 seconds and he described it as 'raw consciousness' beyond any human experience.
• 2.The experience required total ego surrender to avoid perceived psychological destruction. He described a choice between panicking at 'the gates of hell' or fully releasing self, ego, and control — only full relent opened 'unimaginable bliss and euphoria.'
• 3.5-MeO-DMT completely annihilated his default mode network, far beyond what psilocybin achieved. The default mode network constructs ego and self-rumination; Johnson said psilocybin softens it while 5-MeO-DMT 'just turned it off completely.'
• 4.Post-experience, Johnson reported childlike psychological states lasting at least 48 hours. He woke up laughing in a dream for the first time he could recall, felt spontaneous excitement about the day, and handled relationship conflict without defensiveness.
• 5.The longevity rationale came from prior psilocybin data showing metabolic and microbiome resets. Three 25mg psilocybin doses moved Johnson's blood glucose from the 99.5th to 99.9th percentile and visibly rewired brain connectivity patterns captured via Kernel's optical brain interface.
• 6.Johnson has extensive brain-imaging infrastructure to measure psychedelic effects. He used structural MRI, functional MRI, Kernel optical interface, and real-time EEG simultaneously, though he noted data analysis is still pending for the 5-MeO session.
• 7.Risks of psychedelics include permanent psychosis, schizophrenic breaks, and life-altering value shifts. Johnson acknowledged investors have inserted clauses into deal documents banning founders from psychedelics, fearing the 'founder goes off to the jungle' phenomenon.
• 8.Johnson's next longevity frontiers include mitochondrial transplantation and personal organoids. He plans a blood draw within weeks for a third-party mitochondrial therapy; he has also created Brian Johnson iPSC-derived organoids (heart, liver, lungs) to pre-test drugs in a dish before taking them himself.
• 9.Johnson frames psychedelics as uniquely suited for brain rejuvenation that gene therapies may not achieve. He speculated that Fox03/Yamanaka-factor approaches may not safely regenerate neurons, making psilocybin and 5-MeO-DMT potentially the best tools for restoring a youthful mental disposition into one's 50s and 60s.