Open-Label Placebos Reduce Hair Cortisol Concentrations And Psychological Distress: A Randomized Controlled Trial
June 2026
in “
Scientific Reports
”
Studysummary In this study, university students given open-label placebo treatment reported reduced psychological distress and lower hair cortisol concentrations during stressful exams, suggesting that these placebos may help manage the physiological and psychological impacts of prolonged stress.
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