Each month our editorial team sifts through hundreds of papers and curates notable findings—for practitioners and informed readers who want to stay current with the evidence. Subscribe to the monthly Research Digest for expert analysis and concise summaries of key papers.
9 papers
This 2017 review of studies up to 2014 looked at how cannabis and related drugs affect sleep. The authors found early, mixed evidence: cannabidiol (CBD) showed possible benefit for insomnia and some sleep disorders, THC might make people fall asleep faster but could harm sleep quality over time, and some…
Major depressive disorder (MDD) is defined without assuming a single cause and has two main symptoms: depressed mood and loss of interest or pleasure. The paper says we should also pay more attention to fatigue, sleep problems, anxiety, thinking (cognitive) problems, and sexual problems when diagnosing and judging treatment. Some…
This study followed 1,356 apparently healthy, employed adults over about 18 months to see how burnout and insomnia change together. Using standard questionnaires, the researchers found that higher burnout predicted new cases of insomnia and higher insomnia predicted new cases of burnout, even after adjusting for depression and other factors.…
In a small, randomized, placebo-controlled trial, 30 women ate Hericium erinaceus (HE) cookies or placebo cookies for 4 weeks. After HE intake, overall depression scores (CES-D) and scores for vague or indefinite complaints (ICI) were significantly lower than before. Two specific ICI items, written as "insentive" and "palpitatio," were lower…
The researchers surveyed more than 550 adults in Romania with self-report questionnaires to study links between ADHD symptoms, sleep problems, and morning/evening preference. They found that people with probable ADHD more often had insomnia-type sleep problems (over 50%), slept less, took longer to fall asleep, and woke up more at…
This article reviews studies and a patient case about how cannabis and related compounds affect sleep. The authors found that the research is limited and often small or observational. Overall, cannabis products seem to have little or no clear benefit for sleep disorders and can cause sleep problems for some…
This review looked at 34 studies that tested cannabidiol (CBD) for sleep problems. Some studies used mostly CBD and others used CBD with similar amounts of THC. Many studies reported that at least some participants had better sleep, but very few studies focused only on people with insomnia and most…
This systematic review looked for events that can trigger sudden mood episodes in people with bipolar disorder. The authors examined 108 studies published up to May 23, 2022. They found the strongest evidence that antidepressant use is linked to manic or hypomanic episodes. Other reported triggers for mania included brain…
This online study surveyed 185 healthy, pain-free adults in Saudi Arabia between December 2024 and April 2025 using validated Arabic questionnaires for physical activity, sleep quality, and anxiety. On average participants reported 1730.02 MET·min/week of physical activity and 6.77 hours/day of sedentary time. The researchers found no significant links between…
