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Caffeine Intake and Sleep Quality: 428 Working Adults, Source by Source

MHD featured image for caffeine intake, coffee and tea sources, and sleep quality in working adults.

A 2026 cross-sectional study involving 428 employed adults found that poor sleepers reported a median 292.8 mg/day of caffeine, compared with 176.1 mg/day among good sleepers, and total caffeine intake still predicted higher Pittsburgh Sleep Quality Index scores after adjustment (β = 0.147, p = 0.003). The source breakdown is the useful part: black coffee, …

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Caffeine & Depression: Lower Risk with >90 mg per Day in Adults (2022 Study)

In the quest to understand the intricate links between our dietary habits and mental health, a recent study leveraging data from the National Health and Nutrition Examination Survey (NHANES) 2017-2018 offers new insights into how caffeine consumption correlates with depression. This comprehensive analysis reveals that moderate caffeine intake might have a protective effect against depression, …

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Caffeine to Prevent Alzheimer’s Disease via Adenosine A2A Receptors? (2023 Review)

Alzheimer’s Disease (AD), a prevalent form of dementia, poses significant challenges for individuals and healthcare systems worldwide. Current treatments primarily offer symptomatic relief without altering the disease’s progression. However, emerging research suggests that caffeine, a widely consumed psychoactive substance, may have neuroprotective properties against AD. Highlights: Alzheimer’s Disease is the most common form of dementia, …

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