The present invention is based on the development of a method for cosmetic delivery of L-ascorbic acid-containing compositions to the layer of the skin wherein collagen formation takes place to enhance production of collagen and thereby combat some of the effects of aging and oxy-radical damage on skin....http://www.google.de/patents/US6302874?utm_source=gb-gplus-sharePatent US6302874 - Method and apparatus for electrically assisted topical delivery of agents for cosmetic applications
