The research was performed during the period 18.03.09 to 10.05.09 at the enterprise “Moldsuinghibrid”. The aim of the experiment was to study the effectiveness of the utilization of the probiotic Biomin IMBO supplement at different levels, using the indices of weight growth and substance exchange in young pigs. The obtained data showed that the addition of preparation Biomin IMBO to the mixed fodders for young pigs at the level of 1.0 - 2.0 kg/t did not lead to an increased body weight (the experimental lots compared with the control lot); it also showed that the fodder consumption decreased and that it was eaten better.