#55 - TBI-Ibogaine Roundtable with Michael Guymon, Chris Simpson-Daniel & Mark Thomas Irwin
From Ibogaine Uncovered by Beond
January 18, 2026 · 1h 3m · Episode 55
About this episode
The episode discusses the impact of traumatic brain injury on athletes and explores ibogaine treatment as a potential intervention.
For athletes with traumatic brain injury, when the cheering stops, the damage does not. On this episode of Ibogaine Uncovered , host Talia Eisenberg is joined by former pro rugby player Chris Simpson-Daniel, bare knuckle champion Mark “The Shark” Irwin, and retired MMA veteran Mike “The Joker” Guymon. They speak about traumatic brain injury, early cognitive decline, depression, and the absence of viable medical treatment. The conversation traces their careers in rugby, MMA, and bare knuckle fighting, the slow accumulation of head trauma, and the neurological symptoms that followed. They discuss systemic failures within sport, the psychological toll of identity loss, and the lack of long-term care. The episode then turns to their shared experience undergoing ibogaine treatment at Beond, exploring neurological symptoms, emotional processing, physical recovery, and the emerging evidence that ibogaine may offer meaningful intervention for TBI when conventional medicine does not. Chris Simpson-Daniel is a former professional rugby player in the UK, involved in the class action lawsuit addressing long-term brain injury in rugby and founder of Tempest Group Villages, a supportive living…
People in this episode
Host: Talia Eisenberg
Guests: Chris Simpson-Daniel, Mark Thomas Irwin, Mike Guymon
Topics covered
- traumatic brain injury
- ibogaine treatment
- athlete health
- mental health
- cognitive decline
- psychological impact
Keywords
- TBI
- ibogaine
- athletes
- mental health
- cognitive decline
- head trauma
- psychological therapy
Mentioned in this episode
Organizations: Beond, Tempest Group Villages, Athletes Journey Home
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