The Giants Shoulder #116 Meet The World’s Greatest Psychedelic Receptor Scientist
Apr 30, 2026
Bryan L. Roth, a leading receptor scientist who solved LSD’s serotonin receptor structure and develops non-hallucinogenic psychedelics. He recounts his path into receptor work and the DARPA-funded hunt for therapeutic but non-trip compounds. The conversation covers kappa opioid vs serotonin mechanisms, the claustrum’s role in perception, and ultra-large virtual screens for novel drugs.
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2016 Papers Triggered The Psychedelic Research Boom
- The 2016 psilocybin clinical papers catalysed the psychedelic research renaissance and mainstream interest.
- Before 2016 research was constrained linguistically (grants avoided the word psychedelic) and only a handful of labs studied these receptors.
A Colleague's Psilocybin Cure Changed Perception Of Efficacy
- Roth observed a close scientist friend in Australia cured of depression after legal psilocybin therapy, which changed his view on therapeutic potential.
- The friend's facial 'brightness' convinced Roth that profound clinical benefits occur for some patients.
Veteran Said Ibogaine And Psilocybin Ended Suicidal PTSD
- A Vietnam veteran described multiple psilocybin and ibogaine sessions that eliminated severe combat-related PTSD and suicidal intent.
- Bryan L. Roth recounts the veteran saying the gun was in his mouth before the treatments and now he's essentially fine.