The problems of overweight and obesity have been analyzed, and the main ways to solve them have been investigated, one of which is the consumption of specially designed bran bars for body weight control. Based on the recommendations of experts, it has determined that the main components characterized by a high fiber content are oat and wheat bran, flax seed meal, in particular, the proposals of specialists on their content in the target products planned for development have been analyzed. Based on these data, 9 model compositions of the mentioned components have been created, their organoleptic properties have been assessed using a specially created point scale, on the basis of which, using the weight coefficients, their complex quality indicators has been determined. The information obtained was used to develop and build a mathematical model of the composition of the compositional base of bars for body weight control