TIL Sleep triggers a "wash cycle" in the brain. Studies show that during sleep, the space between brain cells widens over 60%, allowing cerebrospinal fluid to flush out waste like beta-amyloid. Because of this, pulling an all-nighter stops this waste from clearing, causing brain fog. reddit.com: what's new online! By: /u/whoiswhoJH 1 September 2026 at 20:48 submitted by /u/whoiswhoJH to r/todayilearned [link] [comments]
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