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The low-pH aqueous composition contains vitamin B3 compound, coumaric acid and a glycol co-solvent.
November 22, 2024
By: Christine Esposito
US Patent No. 12,144,882 B2 (Matthew Clair Ehrman, Tomohiro Hakozaki, John Erich Oblong, Dissanayake Mudiyanselage Mahathma Bandara Dissanayake, Wan Ting Chung); The Procter & Gamble Company patented a method of improving the appearance of skin by applying a low-pH, aqueous skin care composition to a portion of skin over the course of a treatment period. The composition is comprised of vitamin B3 compound, coumaric acid, a glycol co-solvent chosen from propylene glycol, dipropylene glycol, butylene glycol, pentylene glycol, hexylene glycol, ethoxydiglycol, C2-C6 polyethene glycols, or mixtures thereof; wherein the composition comprises less than 25% of the glycol co-solvent; one or more hydrotrope chosen from salicylic acid, 2,4 dihydroxybenzoic acid, 2,3 dihydroxybenzoic acid, 3-methoxy salicylic acid, salts of these, or mixtures thereof; and water.
The composition, which has a pH of the composition is less than 5.0, is free of coumaric acid crystals.
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