A modulator of metabolic processes and method of manufacturing same is provided. The invention may have applicability in at least the fields of medicine, veterinary medicine, medical industry, and agriculture. The essence of invention is a chemically modified biopolymer with a polypeptide chain as an exogenous modulator of metabolic and energy exchange processes between a cell and environment, characterized in that it comprises chlorine atoms covalent-bonded with nitrogen atoms of polypeptide chain to the amount of 0.5 to 40% of the total mass of modified biopolymer, whereas the polypeptide chain includes methionine sulfoxide, cysteinic, .alpha.-aminomalonic and .alpha.-aminoacetoacetic acids to the amount of 1-20 acid residues per 1 mole of final product. The proposed modulator possesses large resource of free energy due to high degree of oxidation, thus ensuring catalytic activity when interacting with clue enzymes and return of particular organs and systems to normal physiological condition.