The treatment of chronic diseases requires highly effective drugs with minimal side effects. The peptide hormone insulin plays a key role in the treatment of diabetes. Since the number of diabetes mellitus diseases is constantly increasing, increasingly larger quantities of insulin must also be produced. Nowadays, insulin is produced on an industrial scale using recombinant microorganisms. In order to be able to use the protein molecules as active ingredients, they have to be purified in a multi-stage process that is both time-consuming and costly. Up to 50 per cent of the production costs of protein therapeutics arise during the purification process. With the help of effective artificial adsorbers or receptors that reversibly bind insulin, the purification process could be considerably simplified and thus become more economical.