I can't believe this story, but you might

KAMPALA — In a country where most people weigh less than 125 lbs., U.S. missionaries Tom and Rhonda Beck have managed to stay tubby by drinking local goat milk and shipping in boxes of Jif peanut butter from their native South Dakota

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Money quote:

"Our children always tell us, 'They are round like the moon!'" says a Ugandan woman. "We love watching them waddle around handing out gospel literature."
Before the Becks went to the mission field, pastors say they weighed between 250-300 lbs.
"There was a lot of heft to his sermon, and I don't just mean the message," says a pastor who dined with the Becks and watched them raze the breakfast buffet

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