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Caffeine in the hours before bed can cut deep sleep by as much as 20 percent even in people who feel they sleep fine.
Drawn from what Matthew Walker said
What Matthew Walker actually said
- Matthew Walker Professor of neuroscience and psychology at the University of California
some people can fall asleep and some people stay asleep but the amount of deep sleep that they have is compromised in fact it can drop your deep sleep by up to 20%
Added to korrents 9 Oct 2026 · How quotes work · Something wrong? Tell us
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