Patent ID: 8455460

Claim:
A cosmetic composition comprising, as active principle, one or more β-(1,3)-glucuronans or β-(1,3)-glucoglucuronans of formula (I): in which: R 1 , R 2 and R 3 , which may be identical or different, selected independently for each glucose unit, represent a hydroxyl, alkoxy, acyloxy or sulfonyloxy group; R, selected independently for each glucose unit, represents a carboxyl, alkoxycarbonyl, acyl group, or a group —CH 2 R 4 , where R 4 represents a hydroxyl, alkoxy, acyloxy, sulfonyloxy, or sulfinyl group; n is selected in such a way that the average molecular weights are between 500 and 4 000 000 dalton; and where at least 0.1% of the groups R, selected independently for each of the glucose units in question, represent a carboxyl, alkoxycarbonyl, or acyl group; as well as their pharmaceutically acceptable salt.