Caffeine hinders the brain’s recovery following sleep deprivation...
Nicholas Fabiano, MD@NTFabiano
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Jun 02, 2025
~1 min read
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Caffeine hinders the brain’s recovery following sleep deprivation by suppressing cerebral grey matter response.
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These findings are from a study in @SciReports which explored whether daily use of caffeine could prevent or exacerbate the grey matter alterations induced by 5-day sleep restriction. nature.com/articles/s4159… 2/9
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On the cerebral level, both acute sleep loss and daily caffeine intake can lead to a decrease in human grey matter volumes as measured by magnetic resonance imaging (MRI). 3/9
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In this study, each participant underwent a 9-day laboratory visit consisting of one adaptation day, 2 baseline days (BL), 5-day sleep restriction (5 h time-in-bed), and a recovery day (REC) after an 8-h sleep opportunity. 4/9
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Nineteen participants received 300 mg caffeine in coffee through the 5 days of chronic sleep restriction, while 17 matched participants received decaffeinated coffee. 5/9
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Independent of the caffeine-induced variances in cerebral blood flow, there were opposite grey matter responses between the caffeine and decaffeinated groups after chronic sleep restriction. 6/9
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However, most cortical changes recovered to the baseline level after an 8-h sleep opportunity. 7/9
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Most importantly, individuals with a lower availability of subcortical A1 adenosine receptors (A1R) at baseline showed a larger caffeine-associated grey matter decrease after chronic sleep restriction in all responsive regions except for thalamus. 8/9
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Overall, these results reveal region-dependent grey matter plasticity after chronic sleep restriction, which diverges between the presence and absence of caffeine. 9/9
