Liquid crystal containing cosmetic and pharmaceutical...

A - Human Necessities – 61 – K

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A61K 9/127 (2006.01) A61K 8/02 (2006.01) A61K 8/67 (2006.01) A61K 31/07 (2006.01) A61K 31/23 (2006.01) A61K 31/355 (2006.01)

Patent

CA 1333567

Cosmetic and pharmaceutical compositions and methods comprising delivery systems for the controlled release and enhanced penetration of biologically active materials (e.g., Vitamin A) to the skin. The delivery systems comprise cholesteric liquid crystals wherein the active material is retained within the lamellar molecular structure (i.e., between the molecular sheets) of the choles- teric liquid crystal.

585436

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