Procedimiento para obtener un extracto estandarizado de quercetina y 3-O-metilquercetina a partir de flores de marcela (Achyrocline satureioides), y composiciones cosméticas y farmacéuticas que comprenden dicho extracto

Un procedimiento de extracción para obtener un extracto estandarizado de quercetina y 3-O-metilquercetina a partir de inflorescencias de marcela (Achyrocline satureioides) caracterizado por comprender las siguientes etapas: A) moler las inflorescencias de Achyrocline satureioides para obtener un material de planta molida; B) someter la planta molida a al menos cuatro fases secuenciales de extracción hidroalcohólica a una temperatura de 60ºC a 80ºC, durante 3 a 4 horas para cada fase, para obtener 4 extractos hidroalcohólicos intermedios; C) combinar los 4 extractos hidroalcohólicos intermedios; D) concentrar la mezcla de extractos hidroalcohólicos intermedios; para obtener hasta un máximo de 20% de la masa inicial de los extractos hidroalcohólicos intermedios; E) secar el material obtenido en (D). It describes an extraction process for obtaining a standardized extract of quercetin and 3-0-methylquercetin from inflorescences of macela-do-campo (Achyrocline satureioides) characterized by comprising of the following steps: A) grinding the inflorescences of Achyrocline satureioides to obtain a material of ground plant; B) submitting the ground plant to at least four sequential stages of hydro-alcoholic extraction at a temperature from 60° C. to 80° C.1 for 3 to 4 hours for each stage, in order to obtain 4 intermediary hydro-alcoholic extracts; C) combining the 4 intermediary hydro-alcoholic extracts; D) concentrating the intermediary hydro-alcoholic extracts mixture; in order to obtain up to a maximum of 20% of the initial mass of the intermediary hydro-alcoholic extracts; E) drying the material obtained in (D). It also describes cosmetic, pharmaceutical and veterinary compositions containing the aforesaid extract of macela-do-campo, destined for the prevention and treatment of the damages arising from inflammatory, microbial and oxidation/lypoperoxidation reactions. The use and method of application of the aforesaid extract of macela are also described.