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Two Preservative Systems
Just a general question for you guys. Can I use TWO preservative systems in a cream or serum? I was thinking Neoguard and Optiphan. I emailed the supplier and she said that I absolutely can. I know some of you may be wondering why I want to use two, I just ear on the side of caution. (I know I can’t use this for something like a vitamin C serum, I am just asking in general…)
So please let me know if this will be okay. Also, what would you guys recommend in terms of % of each one? Perhaps the midpoint of the recommendation of each chemical?
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