Optiphen is a liquid preservative appropriate for fighting bacteria and yeast in our products (I can’t find any information on its efficacy against mould). Its INCI is Phenoxyethanol (and) Caprylyl Glycol. We know phenoxyethanol is a very effective against bacteria and yeast, but what about caprylyl glycol? It is paraben free and is not a formaldehyde…
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