Demi Moore traveled to Austria to undergo a bloodsucking leech treatment in a bid to stay young and healthy.

The 45-year-old actress admits she is constantly searching for "the cutting edge in health and healing" and subjected herself to the wacky therapy session during a recent stay at a European spa.

She tells talk show host David Letterman, "A month ago I was in Austria doing a cleanse. And one treatment was leech therapy. These aren’t swamp leeches, they were highly trained medical leeches. High level bloodsuckers."

"It detoxifies your blood. And they have a little enzyme that when they are biting down on you is released in your blood."

"It crawls into your belly button and it bites down and then you relax and you watch it swell up and get fatter and fatter. And when it’s super drunk on your blood, it just rolls over like its drunk in a bar."

"You first feel worse and then you feel better. I’m feeling very detoxified."