As the use of personalized medicine continues to widen, a Massachusetts-based nonprofit organization is looking to get really personal and it's paying good money for healthy stool samples.

The company, OpenBiome, is willing to pay as much as $250 for a week's worth of donations of healthy stool samples, or $13,000 a year, according to The Washington Post.

However, donors must undergo vigorous questioning and stool testing to make the cut.