The present invention is related to a composition containing an extract from the Polygonum minus for cognition and cosmetic purposes. The method of obtaining the said extract from the Polygonum minus is also disclosed. In another preferred embodiment, the cognition and cosmetic composition contains extract of Polygonum minus comprise a combination of compounds characterized by presence of quercetin-3-glucuronide and quercitrin. In another preferred embodiment, wherein the amount of said extract of Polygonum minus is selected based on its having efficacy in prevention of oxidative damage demonstrated by a high antioxidant value and Cell-based Antioxidant Protection in an Erythrocyte model (CAP-e assay). In another preferred embodiment, there is provided a process for isolation of an active extract from Polygonum minus comprising the steps of a) subjecting the said Polygonum minus including aerial parts of the plant including stem and/or leaves to solvent extraction preferably with a material solvent ratio of 1: 10-20 by percolation at a temperature range of 70-105° C preferably 80° C to obtain the extract； and b) filtering the extract obtained from step (a) above followed by concentration and drying involving freeze drying, spray drying or vacuum belt drying to obtain therefrom the dry extract powder.La présente invention concerne une composition contenant un extrait de Polygonum minus à des fins cognitives et cosmétiques. L'invention porte en outre sur un procédé d'obtention dudit extrait à partir de Polygonum minus. Dans un autre mode de réalisation préféré, ladite composition à des fins cognitives et cosmétiques contient un extrait de Polygonum minus comprenant une combinaison de composés caractérisée par la présence de quercétine-3-glucuronide et de quercitrine. Dans un autre mode de réalisation préféré, la quantité dudit extrait de Polygonum minus est sélectionnée sur la base de son efficacité dans la prévention de dommages oxydatifs démontrés par une valeur ant
