Demi Moore uses leech therapy to combat aging

Demi Moore has revealed her secret to beating the signs of aging -- leeches.

The 46-year-old actress, who is married to 30-year-old Aston Kutcher, says she is a fan of a detox treatment that involves being covering in blood-sucking leeches -- and recently visited Austria to receive the "leech therapy".

Demi told U.S. talk show host David Letterman: "I feel like I've always been someone looking for the cutting edge of things that optimize your health and healing.

"I was in Austria doing a cleanse and part of the treatment was leech therapy.

"These aren't just swamp leeches though - we are talking about highly trained medical leeches. These are not some low level scavengers - we're talking high level blood suckers."

The actress -- who has three children with ex-husband Bruce Willis -- says the treatment leaves her feeling 'revitalized'

She added: "They have a little enzyme that when they are biting down in you it gets released in your blood and generally you bleed for quite a bit - and your health is optimized.

"It detoxifies your blood - I'm feeling very detoxified right now. I did it in some woman's house laying on her bed. We did a little sampler first, which is in the belly button.

"It crawls in and you feel it bite down on you and you want to go, 'You bastard.' Then you relax and work on your Lemaze breathing just to kind of relax.

"You watch it swell up on your blood, watching it get fatter and fatter - then when its super drunk on your blood it just kind of rolls over like it is stumbling out of the bar."

She is convinced that leeches -- which are sometimes used in plastic and reconstructive surgery to assist in the reattachment of severed body parts -- are effective and plans to return to Austria for more sessions.

She said: "You first feel worse then you feel better. But I'm going back - I only got 4 leeches and I feel a bit cheated."

Quipped Letterman: "Are you sure this isn't just menopause?"