Panthenol is the alcohol analog of pantothenic acid (vitamin B5), and is thus the provitamin of B5. Panthenol comes in two enantiomers, D and L. Only D-panthenol (dexpanthenol) is biologically active, however both forms have moisturizing properties. For cosmetic use, panthenol comes either in D form, or as a racemic mixture of D and L (DL-panthenol). The product is used in many cosmetic products for their skin emollient, regenerating and hair conditioning properties.
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