A survey of ayahuasca retreat center visitors found that these individuals reported greater gratitude, nature relatedness, and nature appreciation after the ayahuasca retreat experience. Individuals with stronger mystical experiences during ayahuasca sessions tended to report greater increases. The research was published in the Journal of Psychoactive Drugs. Ayahuasca is a powerful psychoactive brew traditionally used in spiritual and healing ceremonies by indigenous peoples of the Amazon basin. It is made from the Banisteriopsis caapi vine and the Psychotria viridis shrub, which contain compo…