I read about it in studies! see, for example: Hohenschurz-Schmidt D, Phalip J, Chan J, et al. 2024 Placebo analgesia in physical and psychological interventio

I read about it in studies! see, for example: Hohenschurz-Schmidt D, Phalip J, Chan J, et al. 2024 Placebo analgesia in physical and psychological interventions: Systematic review and meta-analysis of three-armed trials. “The average short-term placebo effect was small,” Strijkers RHW, Schreijenberg M, Gerger H, Koes BW, Chiarotto A. 2021 Effectiveness of placebo interventions for patients with nonspecific low back pain: a systematic review and meta-analysis “probably not clinically relevant.”