Avon Isa Knox LXNEW Clinical Booster Microbiome Balance 1 oz. Pre & Probiotics. blend of PRE-BIOTICS, POST-BIOTICS and PRO-BIOTIC EXTRACT helps balance the microbiome, the protective layer of microflora that lives on skin and balances its pH level. 2.3% Blend of Pre, Pro and Postbiotics, 5.5 pH Microbiome Balance TO USE: Apply a few drops over your entire face, AM and PM after cleansing, before serums or creams, or mix a few drops into your serums or creams for customized results.