*This act shall be supplementary to the laws of this state now in force prohibiting the adulteration of food and fraud in the sale thereof; and the state dairy and food commissioner, the chemist of the state agricultural experiment station, the state attorney general and the prosecuting attorneys of the several counties of this state are hereby required, without additional compensation, to assist in the execution of *this act, and in the prosecution of all persons charged with the violation thereof, in like manner and with like powers as they are now authorized and required by law to enforce the laws of this state against the adulteration of food and fraud in the sale thereof.