References
1. Farris P. Cosmeceutical vitamins: vitamin C. In:
Draelos ZD, editor. Cosmeceuticals. Philadelphia:
Elsevier Saunder; 2005: 51-6.
2. Jung K, Sacher M, Blume G, Janssen F, Herrling
TH. How Active are biocosmetic ingredients
SOFW J 2007; 133: 2-7.