Harvard Health Letter

Coldhearted is not healthy

April may be the cruelest month, but January is the coldest in many parts of the country. Exposure to cold has a variety of physiological effects that ramp up blood pressure and may make blood more likely to clot. Numerous studies have shown that heart disease deaths and hospitalizations peak during the winter. Others factors may be involved (flu infections, for example) but chilly temperatures almost certainly contribute.

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