“The Human Shutdown” on BrightU – Why your brain’s garbage disposal only runs while you dream During deep sleep, the brain’s glymphatic system actively cleanses itself by flushing out toxic proteins like amyloid-beta, which are linked to Alzheimer’s disease. Eating close to bedtime diverts blood flow to digestion, impairing the brain’s cleaning process and preventing effective waste removal. The brain requires a full eight hours of sleep to completely detoxify, with at least four hours needed between the last meal and bedtime for optimal brain health. Shortchanging this cleansing window triggers a cascade of biological damage, including hormonal imbalance, mitochondrial…

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