Effilyse is the ideal assistant to develop and produce personalized diets for a wide spectrum of people (from the sedentary person to the top-level athlete). It is an "expert system" for health, fitness or sports professionals. Effilyse allows the creation of files per patient: identity, impedance and morphology measurements, physiological conditions, diet habits and the avoidance of certain food items. The measurements obtained with Ohmniscan can be entered in the Effilyse software and it will then calculate the patient’s daily energy needs. As the data on basic metabolism and energy needs are known, the software personalizes the menus according to these data.