Preservatives for cream with probiotics

Unknown Member
Anybody have suggestions for food grade preservatives to be used in facial cream with probiotics?preservatives that will not kill probiotic bacteria?
and also need advice on ph adjusters to be used in lotion formulations?
Thanks!
i am new to cream formulating . 
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Comments

  • PharmaPharma Member, Pharmacist
    Depending on the probiotic bacteria you're using, low pH and low water activity plus high salt might work... but then, your product will ferment and then the little guys will slowly start to die once they run out of food (food = your facial cream). Use an anhydrous formulation with lyophilised probiotics instead or switch hobby and produce plain yoghurt or kombucha and not rotten cosmetics ;) .
    More or less safe food grade preservatives are benzoic acid/benzoate and sorbic acid/sorbate. They don't distinguish between 'good' and 'bad' microbes.
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