Every day, major news outlets pick up a few trivial “offbeat” stories in order to pad out the international mayhem, barely concealed commercials, punditry, and celebrity gossip which constitutes the news. One such puff-piece in the news today features the story of a spa in Tokyo which is offering snail facials. Apparently credulous yet affluent Japanese women can pay to have snails crawl on their face for approximately an hour. The snails are fed on organic carrots and greens so that their mucous–and whatever else passes out of them–will be, well, organic.
There is a rationale behind this wacky beauty regime. Snail slime contains hyaluronans (aka hyaluronic acids), long unbranched polysaccharides found in animal tissues which promote healing and flexibility. Hyaluronans have been found to play a major role in wound healing and it is a major component of cartilage and skin (they are also implicated in the prevention of cancer—and malfunction of hyaluronan-producing cells is likewise implicated in cancerous mutagenesis). Cash-seeking dermatologists have long used hyaluronan as a “filler” to inject into skin to minimize the appearance of wrinkles and as a relatively inert ingredient in their creams and unguents, however recently hyaluronans made the news in an even bigger way with a fascinating, albeit erudite article about the longevity of naked mole rats. You can read the actual research abstract here, but ABC News more concisely summarizes the possible implications of the research by writing, “Last month, researchers at the University of Rochester wrote that naked mole rats’ super-long hyaluronan molecule actually tells cells to stop reproducing, which is why they think naked mole rats don’t get cancer.”
Unfortunately, whatever actual importance hyaluronans have in the human body (and whatever importance super long hyaluronans have for the doughty naked mole rat), it does not seem that being coated in snail mucous necessarily has much benefit. Dermatologists aver that, as the snail slime (which may be of dubious benefit anyway) simply lies on top of the dead waterproof dermis, it cannot have much if any magic mole-rat age-reducing effect. That still doesn’t deter desperate people who let gastropods crawl all over their face in a quest for eternal youth.