People who feel drowsy during the day may be three times more likely to develop Alzheimer’s than their spritely peers, new research suggests.

Tracking 123 volunteers for 16 years, researchers found that no matter what the reason – whether it’s lack of sleep, stress or something else – daytime sleepiness was associated with higher risk of the disease.

The research team at Johns Hopkins, working with the National Institute of Aging, said their findings are part of a wave of research showing sleep may be more important for our health than we realize.

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