The invention regards a portable medical apparatus made up of at least two devices (30, 32) adapted to measure eating rate utilized to teach persons to eat according to a predetermined graphic eating curve (10, 24) displayed on a screen and a method therefore. In a specific mode the predetermined graphic curve (24) describes a non linear descending rate of eating behavior. The apparatus comprises a device with cellular capabilities (30), and a scale (32), which devices communicate through near field radiation such as Bluetooth or IR.
