Abstract: The invention refers to a medical device for supporting health control. In order to provide safe access to a dose helper functionality, the device has a first storage means arranged to store an initial data matrix with at least one initial parameter set containing at least two initial data entries for one parameter of the dose helper functionality; receiving means arranged to receive initialization data and/or security data, preferably from a second storage means, for example provided by a hardware key; selecting means operable to select based at least in part on the initialization data one data entry for each initial parameter set as initial data or one initial parameter template containing a reference to one data entry for each initial parameter set as initial data; and first activation means arranged to activate, preferably based at least in part on the security data, execution of the dose helper functionality based on the selected initial data.