Water or Coffee? What Science Says About Hydration & Alertness

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Water or Coffee? What the Science Says About Morning Hydration, Alertness, and Blood Flow

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Water or Coffee? What the Science Says About Morning Hydration, Alertness, and Blood Flow

You might think caffeine is the first order of the day upon waking. What does science say about it? Tune in for the answer!🎧

Jan 20, 2026

Sources:

Nishi et al. (2023). “Water intake, hydration status and 2-year changes in cognitive performance: a prospective cohort study.” BMC Medicine. https://link.springer.com/article/10.1186/s12916-023-02771-4
Sumitra et al. (2025). “Hydration status and its impact on cognitive performance and reaction time in young adults: A comparative study.” Int J Acad Med Pharm.
Hoshi et al. (2025). “Effect of fluid intake on cognitive function in older individuals: A prospective study.” PLOS One. https://doi.org/10.1371/journal.pone.0333793

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