A gaggle of former US Navy Seals open up about their post-traumatic stress in this absorbing if somewhat formulaic documentary by Jon Shenk and Bonni Cohen. Ultimately, it is something of an advertisement for a new therapeutic protocol that involves the veterans taking the hallucinogens ibogaine (derived from an African shrub) and 5-MeO-DMT (derived, like something out of a William S Burroughs novel, from a river toad); a treatment that, to hear the subjects here describe it, can work miracles on the battle-scarred, suicidal minds of its users. Currently, the treatment is only available at a Mexican clinic because the drugs have not been cleared by the US Food and Drug Administration, but a bunch of boffins connected to Stanford University’s Brain Stimulation Lab are studying its cl

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