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As the instability of vitamin C and vitamin E, double emulsion was chosen as a carrier system for dermal delivery of vitamins. The present work shows how to prepare and evaluate a double emulsion containing both vitamin C and vitamin E. The double emulsion was produced by two-step process. The concentration of vitamins were analyzed by UV, and the morphology of double emulsions were observed with optical microscopic. Vitamins could be protected well in one system, which was W/O/W double emulsion. The shape of double emulsion was also an evidence for the safety of vitamins. In the end, we obtained a stable double emulsion containing both vitamin C and vitamin E for cosmetics.
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Xia et al. (2011) studied this question.
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