Patent ID: 7560493

Claim:
A composition comprising: a physiologically acceptable medium comprising an aqueous phase; at least one oxidation-sensitive hydrophilic active principle, wherein the hydrophilic active principle is selected from the group consisting of ascorbic acid, 5,6-di-O-dimethylsilylascorbate, dl-α-tocopheryl di-ascorbyl phosphate potassium salt, magnesium ascorbyl phosphate, sodium ascorbyl phosphate phloroglucinol, kojic acid, and mixtures thereof; and at least one non-crosslinked N-vinylimidazole/N-vinylpyrrolidone copolymer, the at least one active principle and the at least one non-crosslinked-N-vinylimidazole/N-vinylpyrrolidone copolymer both being present in the aqueous phase, wherein the copolymer is present in concentration of between 0.1 and 5% by weight of the aqueous phase and wherein no more than 30% of the oxidation-sensitive hydrophilic active principle in the composition is decomposed after 2 months at 45° C.