On the stability of ascorbic acid in emulsified systems for topical and cosmetic use.

@article{Gallarate1999OnTS,
  title={On the stability of ascorbic acid in emulsified systems for topical and cosmetic use.},
  author={Marina Gallarate and Maria Eugenia Carlotti and Michele Trotta and Sara Bovo},
  journal={International journal of pharmaceutics},
  year={1999},
  volume={188 2},
  pages={233-41}
}
Several O/W microemulsions, O/W and W/O emulsions and a W/O/W multiple emulsion were prepared using non-ionic, non-ethoxylated, skin compatible emulsifiers. Ascorbic acid (vitamin C) was added to the emulsified systems and its stability against oxidation was studied at 45.0 degrees C in aerobic conditions and compared with that in aqueous solutions at different pH values. All emulsified systems provided protection to ascorbic acid, as its degradation rate, which increased with increasing pH… CONTINUE READING
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