The researchers took blood samples and other physiological measurements at the end of each treatment period. (sciencedaily.com)
The study participants had to give a similar speech at the end of the treatment period, so researchers could assess whether their patterns of brain activity had changed. (sciencemag.org)
By the end of the treatment period, those given kava showed significantly greater improvements in sleep quality and in wellbeing (compared to those given the placebo). (verywellhealth.com)