The slimy secret of eternal youth: Japanese salon launches anti-ageing beauty treatment that involves letting live SNAILS crawl across your face They have long been regarded as a nuisance in the garden but it seems that snails could be more friend than foe when it comes to anti-ageing. A revolutionary new facial that involves allowing live snails to slither across the complexion has been hailed the next big thing in beauty thanks to the glow-boosting properties of snail mucus.