A mobile apparatus, method and system for processing blood sugar affecting factors are disclosed. The mobile apparatus (10) is adapted to be handheld and configured for electronic processing of blood sugar affecting factors, and comprises comprising a first central processing unit arranged for processing of patient critical information objects, at least one memory comprising a plurality of in advance stored food units and values of at least one related blood sugar affecting parameter, such as glycemic indexes and/or glycemical loads and/or carbohydrate contents and/or PH value for respective food unit, an input unit arranged to provide user input for at least one of said food units, such as a choice of one of said food units and an amount thereof, a display arranged for visualization of at least one of said food units for said user input, and for visualization of summed up blood sugar affecting parameters, and a second central processing unit arranged for processing of patient non-critical information objects, such as multimedia objects to be visualized on said display.