The social-stress experiment scheduled participants in the morning. Its cortisol findings concern that controlled session and do not establish how CBD changes a complete daily cortisol rhythm.
The study controlled the clock
Participants generally ate breakfast around 8:30 a.m., began the protocol around 10 a.m. and underwent the Trier Social Stress Test later that morning. The procedure included a preparation period, a job-interview speech and mental arithmetic before post-task sampling.
High-risk participants received CBD or placebo during the preceding week. Healthy comparators attended a study session without entering the medication trial. Standardizing time and procedures helped define the comparison but did not make the healthy reference group another randomized drug arm.
A session response is not a daily profile
The cortisol endpoint was the difference between baseline and immediately after the challenge. Repeated morning observations cannot describe awakening responses, afternoon concentrations or nighttime secretion that were not measured by this procedure. A claim that CBD restored a whole endocrine rhythm would require a different sampling design.
Keep the null comparison in view
Although the CBD group showed an intermediate pattern relative to placebo patients and healthy comparators, its direct cortisol contrast with placebo was not significant. The scheduling detail improves interpretation of that result; it supplies no independent evidence of treatment efficacy or long-term protection from stress-related illness.
Related reading: CBD public-speaking research.
Research cited
Appiah-Kusi and colleagues (2020). Effects of short-term cannabidiol treatment on response to social stress in subjects at clinical high risk of developing psychosis. DOI: 10.1007/s00213-019-05442-6.
Leave a Reply