abstract |
PROBLEM TO BE SOLVED: To provide a low pH composition for topical administration to the skin. These include a buffer having a pKa of about 2.8 to about 4.2 and a cosmetically acceptable active ingredient having a pKa within about one unit of the pKa of the buffer. . The composition has a pH of about 3.3-4 and a buffer capacity of at least about 0.15. Also provided is a method for increasing topical delivery of a cosmetically acceptable active ingredient having a pKa of about 2.8 to about 4. [Selection figure] None |