Skingredients PreProbiotic Cleanse is all about the 3 Ps: prebiotics,?probiotics and polyhydroxy acid. Prebiotics and probiotics are the ultimate balancers, it is all about keeping your skin?s microbiome?? its defence force of bacteria ? balanced. PrePro?cleanses,?revitalises?and gently?exfoliates?the skin for plumpness, softness and hydration.