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WATCH: Obama Time-Lapse Shows Just How Much The Presidency Ages You Published: August 20, 2014

There's a reason why the question "It's 3. a.m. Who do you want answering the phone?" became a constant refrain of the 2008 election. The presidency is an all-hours, no-holds-barred job, and all that work and all that stress take a pretty significant toll on our leaders, according to The Huffington Post.

According to some researchers, it may even accelerate the aging process.

"You see it over a term," geriatric physician Ronan Factora told the Washington Post. "It's a good study of chronic stress on a person's overall health."

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