The present invention provides a sustainable method for the synthesis of metallic, organometallic nanoparticles and metal dendrites using royal jelly as a reducing and stabilizing agent. Said method includes simple stages such as the preparation of an aqueous solution of Rotal Jelly (RJ), preparation of an aqueous solution of metal salts (MS), obtention of a precipitate of metallic, organometallic nanoparticles and metallic dendrites, and purification of the precipitate of metallic, organometallic nanoparticles and metallic dendrites. In addition, the invention allows the size, shape and physicochemical properties of the obtained structures (nanoparticles and dendrites) to be modified with the modulation of the metallic salts/royal jelly ratios. The invention is presented as a sustainable and economically competitive method.