The mushroom that has gained attention for its potential in treating PTSD is the psychedelic mushroom, specifically those containing the compound psilocybin. Several species fall under this category, including Psilocybe cubensis and Psilocybe semilanceata. These mushrooms are being researched for their ability to assist in therapy for PTSD by fostering deep introspection and helping patients confront and understand their trauma in a controlled environment. It's essential to note that using these mushrooms to treat PTSD is still in experimental stages and should only be undertaken with the guidance of trained professionals, as the effects can vary greatly among individuals.