Sleep Disorders
Many young adults use cannabis as a sleep aid, study finds
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A national study of U.S. young adults ages 19 to 30 found that about 22% reported using cannabis, alcohol, or both to help themselves fall asleep, with cannabis far more common than alcohol. Researchers warn that while these substances may help people drift off, frequent use could worsen sleep over time and raise the risk of substance use problems.
A study of young female university students in Saudi Arabia has found that symptoms of anxiety and insomnia are associated with reduced levels of natural killer cells, key components of the immune system’s early defense. The findings suggest that psychological stressors may be linked to weaker immune responses, though the research shows correlation rather than causation and is limited to a small, specific population.
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Researchers at Washington University School of Medicine in St. Louis report that amyloid pathology in mouse models of Alzheimer’s disease disrupts circadian rhythms in microglia and astrocytes, altering the timing of hundreds of genes. Published October 23, 2025, in Nature Neuroscience, the study suggests that stabilizing these cell-specific rhythms could be explored as a treatment strategy.