SOLVED with Mark Manson

Snapshot · SOLVED with Mark Manson

How to Overcome Anxiety, Solved

Explore episode May 6, 2026

Where this was said

#6 Psychedelics — Biggest Effect Size, Thinnest Evidence

At 1:23:23 · chapter starts 1:22:40

Psychedelics rank 6th despite having the largest single effect size on the entire list, largely because the research base is still thin and blinding is impossible — participants always know if they've taken a powerful psychedelic. Drew describes the landmark Roland Griffiths study at Johns Hopkins in which terminal cancer patients treated with psilocybin reported dramatic reductions in anxiety and described the experience as among the most meaningful of their lives. Manson explains the mechanism — psychedelics trigger neuroplasticity, opening a window of cognitive flexibility lasting 1–2 months in which identity and belief patterns can be more easily reshaped. He's anecdotally suspicious of chronic users, noting they tend to adopt the last thing they heard as a new philosophy. Both hosts stress the importance of professional guidance and structured settings, and acknowledge that the FDA's 2024 rejection of MDMA for PTSD reflects the fundamental difficulty of controlling for psychedelic effects in trials.

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