Lack of sleep can make you sick. And while everybody has the occasional restless night, for those who suffer from chronic insomnia — some 15 percent of older adults in the United States — that sleep loss can increase the risk for cardiovascular disease, hypertension, weight gain, type 2 diabetes, and even lead to an earlier death.

The reason for the increased risk of health problems is thought to be an association between insomnia and an increase in inflammation throughout the body that becomes chronic. Though inflammation can be a good thing — part of a robust immune response that heals injury and fights infection, chronic inflammation can damage and kill healthy cells, leading to disease. 

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