It was developed by Stanislav Grof as a successor to his LSD-based psychedelic therapy, following the suppression of legal LSD use in the late 1960s.[6] Following a 1993 report commissioned by the Scottish Charities Office, concerns about the risk that the hyperventilation technique could cause seizure or lead to psychosis in vulnerable people caused the Findhorn Foundation to suspend its breathwork programme.[7] Other types – There are many other types of Breathwork which have emerged over the last few decades, including Integrative Breathwork, Transformational Breathwork, Shamanic Breathwork, Conscious Connected Breathing, Radiance Breathwork, Zen Yoga Breathwork and many others.