... The search found 26 randomized placebo controlled trials (RPCTs) that examined hands-on Reiki's effectiveness over placebo in adults using valid outcome measures translated in English (Thornton, 1991;Dressen and Singg, 1998;Witte and Dundes, 2001;Shiflett et al., 2002;Mackay et al., 2004;Shore, 2004;Gillespie et al., 2007;Assefi et al., 2008;Bowden et al., 2010Bowden et al., , 2011Catlin and Taylor-Ford, 2011;Díaz-Rodríguez et al., 2011a,b;Ventura Carraca, 2012;Baldwin et al., 2013Baldwin et al., , 2017Fortes Salles et al., 2014;Novoa and Cain, 2014;Rosada et al., 2015;Alarcao and Fonseca, 2016;Erdogan and Cinar, 2016;Midilli and Gunduzoglu, 2016;Vasudev and Shastri, 2016;Bat, 2021;Yüce and Taşcı, 2021;Çinar et al., 2022). Fourteen of these met PICO for examining the effectiveness of Reiki over placebo in measuring symptoms of mental health (Thornton, 1991;Dressen and Singg, 1998;Shiflett et al., 2002;Shore, 2004;Bowden et al., 2010Bowden et al., , 2011Díaz-Rodríguez et al., 2011a,b;Rosada et al., 2015;Erdogan and Cinar, 2016;Vasudev and Shastri, 2016;Baldwin et al., 2017;Yüce and Taşcı, 2021;Çinar et al., 2022). ...