Blood glucose system is one of the most important systems of the human body, since energy transport is fulfilled through this complex endocrine control process. Because of great importance (in case of failure, its primary consequence is diabetes mellitus), many models were published, most of them with phenomenological approach. The aim of the current paper is to analyze a new molecular model published recently . Global control theoretical characteristics are determined with nonlinear analysis. Physiological working points are defined for further polytopic modeling with linearization and model reduction is discussed and presented based on medical principles.