This study had 98 participantes. 96% were microdosing with 5ht2a agonists (LSD or psilocybin) using online questionnaires for 6 weeks. Authors found that on days of microdosing people reported an increase in Focus, wellness, productivity, happiness and more. After 6 weeks there was a reduction in reported levels of depression, stress and distractibility.
In a follow up study with 263 people completing online questionnaires about their expected results of microdosing, people's beliefs about what was most likely to change were unrelated to the observed pattern of reported outcomes. Subjects were not blinded, meaning they knew they were microdosing and there was no control group that didn't microdose.