All of you who believe that the Kardashians are actually having a negative impact on the health of Americans, well... here's your proof.

You know that bored, creaky, groan-drawl way of speaking popularized over the years by "Valley girls," Britney Spears, and the Kardashians? That's called vocal fry, and when it becomes habit, it can actually cause you to have serious throat complications.

No, seriously.

There you go, Kardashian foes: cold, hard evidence that they're harmful to young girls.