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One night of sleep, analysed by AI, predicted the future onset of 130 diseases including cancer, heart failure, and dementia. The pillow saw it before the bloodwork did. Researchers in Nature Medicine trained a model on sleep architecture from 100,000 adults and found that fragmented deep sleep carried the strongest predictive signal. Deep sleep is when the brain clears metabolic waste, the heart recalibrates, and immune regulation resets. Disrupt it, and the downstream risk surfaces years later. For more Sleep-Science content follow @lunia_life