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Preservative systems for skin creams
I’m currently making a daily skin cream, however I’m not sure if my preservative system is ok, I’m afraid it’s too much, please advise me. My formula is as follows:
0.3% Caprylyl Glycol
0.1% Butylated Hydroxytoluene
0.1% Sodium Benzoate
0.5% Phenoxyethanol
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4 Replies
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BHT is not an antimicrobial preservative.
What’s pH?
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Yes, since my formula has 0.5% resveratrol, 0.5% extract, I want a little BHT to stabilize the formula
Also my desired pH would be around 5.5-6.0
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In a micro sense - BHT is not relevant but you should add a chelator - esp. EDTA.
No one can guess at your challenge data. Let challenge testing guide your system - your system is not “too much” as the constituents are within the accepted safety in use ranges. You should not titrate to just barely passing whatever protocol used.
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She is already chatting with one of the world’s foremost experts on preservation! Dr Geis, literally wrote the book! 😉
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