The invention relates to an agent with increased thermal stability comprising a core and a coating layer characterized in that the core comprises at least one biologically active protein and that the coating layer comprises a micronized product from leguminous plants, a method for the production of this agent as well as the use of a micronized product from leguminous plants to increase the thermal stability of biologically active proteins in methods for the production of a granulated product as well as in methods for the production of animal feed, food and pharmaceuticals.
