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flag Delayed entry into REM sleep may signal early Alzheimer's, study suggests.

flag A recent study indicates that delayed entry into REM sleep, the dreaming phase, may be an early sign of Alzheimer's disease. flag Researchers observed that participants, especially those with Alzheimer's, took longer to reach REM sleep and had higher levels of toxic proteins amyloid and tau, and lower levels of the healthy protein BDNF. flag The study suggests that medications affecting sleep might influence disease progression.

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