What type of paraben should I use? Methyl or Propyl or mix?
Hi,I’m starting a hair product line, which consist 35% water phase and 65% oil phase. I’ve been recommended to blend methyl- and propylparaben as preservative. Do I actually need both types of paraben or would one type be effective enough?And can anyone recommend which type of paraben is the more effective one?Thanks in advance!
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