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Propanediol: The Skincare Ingredient Derms Want You to Knowdermatologist Dr. Sapna Palep describes propanediol as a natural alternative to propylene glycol. According to dermatologist Dr. Marisa Garshick, propanediol is "a preservative used in various ...
SofZia (Alcon, TX, USA), the most recent preservative of this kind, is a combination of boric acid, zinc, sorbitol and propylene glycol. This ionic-buffered system has been shown to have both ...
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