Your Brain Has a Cleaning Cycle and Meditation Can Run It

Shane Hewitt and The Nightshift · Mar 7, 2026 · 9m

Meditation brain science just found something that had never been recorded before and it changes the case for why any of this matters. Every night while you sleep, your brain runs a cleaning cycle, flushing out the protein buildup and metabolic waste that accumulates during the day. Researchers at Vanderbilt and Brigham and Women's just watched that same system switch on in people who were wide awake.

What does it mean that your brain has a maintenance system and you can influence whether it runs? The people who triggered it were not casual meditators. They had logged 3,700 lifetime hours of…