abstract |
A topical composition comprising: (a) a buffering agent having a pKa of 2.8 to 4.2; and (b) a cosmetically acceptable active ingredient having a pKa within 1 unit of the pKa of the buffering agent; wherein the composition has a pH of 3.3 to 4 and a buffer capacity of at least 0.1; and wherein the cosmetically acceptable active ingredient is cross-linked hyaluronic acid. |