What 24 Hours Without Sleep Does to Your Body

Stay awake for 24 hours and, on some tests, your brain performs like it's legally drunk. Follow Bean the brain through one sleepless night: the molecule that piles up, why caffeine only hides it, the neurons that nap while you're awake, why you get cranky and hungry, the brain's night-shift cleaning crew, and what one night of sleep can (and can't) fix. 0:00 Intro: 24 hours awake = drunk? 0:35 Hour 16: the pressure (adenosine & caffeine) 1:37 Hours 17–24: the drunk brain 2:50 Microsleeps & napping neurons 4:02 Cranky & hungry 5:17 The night shift: the brain's cleaning crew 6:31 The recovery night 7:29 Recap 7:50 Next episode Sources (selected): Dawson & Reid 1997 · Williamson & Feyer 2000 · Vyazovskiy 2011 · Nir 2017 · Yoo 2007 · Schmid 2008 · Spiegel 2004 · Xie 2013 · Miao 2024 · Hauglund 2025 · Yang 2025 · Hao 2022 · Eide 2021. Full list in pinned comment. Never drive drowsy. This video is educational content and does not replace professional medical advice.