Method of monitoring energy consumption of an individual in an information system, comprised of periodically determining the energy balance of the individual by measuring body fat percentages (or body fat mass) at least at three consecutive moments of time and calculating change of body fat percentages (body fat mass) from two consecutive moments of time, and calculating the trends of the individual's energy balance from the changes of body fat percentages (body fat mass) and determining from the trend whether the individual is in the stage of burning or accumulating fat. The information system automatically generates recommendations for controlling energy balance based on the trends of changes of the energy balance.
