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TL;DR: A Swedish study of 42 people with depression found no link between the brain’s main calming chemical, GABA, and slowed movement, early waking or poor appetite. The researchers measured GABA with two kinds of scans, but most patients had fairly mild vers…
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TL;DR: In rats stressed with mild foot shocks, REM sleep, the dream stage, dropped. The insomnia drug suvorexant and two related experimental drugs partly brought it back, and suvorexant also helped the rats fall asleep faster, but this was a small study in 9…
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TL;DR: Among 183 people with Parkinson’s in Finland, daytime sleepiness, napping, restless legs, sleep talking and nightmares all became more common over five years. Insomnia stayed about the same. Key Findings Daytime sleepiness: 31% to 39%. Daily naps: 21% t…
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TL;DR: In a pooled review of 8 studies of 980 people with depression and sleep problems, sleep tests showed more deep sleep and less light sleep after taking trazodone than before. Compared with placebo, though, the deep-sleep gain was not clear, and drowsines…
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TL;DR: A therapy app did not reduce depression scores more than a look-alike education app in a trial of adults with past concussions. Insomnia scores improved more with the therapy app, but only 42 of 113 participants completed the main 12-week check-in. Key…
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TL;DR: A 2026 meta-analysis in PLOS One found clinically important sleep problems in refugee and asylum-seeking populations, with pooled sleep-adversity prevalence of 43.2% in adults and 36.4% in children and adolescents. Key Findings 66 studies reviewed: The…
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TL;DR: A 2026 preprint in medRxiv found that poor sleep tracked faster biological aging across more than 64,000 adults, but twin and genetic analyses left the causal claim mixed rather than settled. Key Findings 64,000+ adults: Researchers tested sleep and agi…
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TL;DR: A 2026 preprint on medRxiv found that in-person cognitive behavioral therapy for insomnia and several shorter behavioral versions were linked with higher post-treatment insomnia remission than sleep hygiene or other control conditions, but the evidence…
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TL;DR: A 2026 systematic review and meta-analysis in Journal of Sleep Research found that agomelatine modestly improved subjective sleep quality versus placebo, but objective total sleep time did not significantly increase and somnolence reports were more freq…
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TL;DR: A 2026 pilot trial in PLOS One found that a 7-day chicory-and-green-tea herbal supplement did not improve sleep, quality of life, or objective sleep architecture more than placebo in adults with insomnia. Key Findings Small crossover pilot: The crossove…
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