The base of this expeller is a processed fruit of Milk thistle and overground part (tops) of Leuzea carthamoides which belongs among the group of biologically active substances (phytoecdysterioids) with a significant effect on metabolism of mammals. It has been proved that ecdysteroids stimulate synthesis of albumins in liver - increase of volume and weight of internal organs, which results in increase of the total animal weight due to increased muscular growth.