The problem of using biologicalliactive substancesin domestic animalfeedingis one of main problems of the world researchess. Our investigations studied the influence of BioR preparation on suina youth performances. BioR preparation is a biologically active one obtained using original tehnologies of oriented syhthesis, successive extraction, division and purification of bioactive priciples from cyanophit alga biomass Spirulina platensis. This preparation contains biologic active substances as aminoacids and oligopeptides, intermediary products of the glucide and lipid metabolisms, macro and microelements. The results of the investigations proved that the administration of BioR preparation had a positive influence on productive indices of suina namely: the body weight increased by 0.5-10.4%, daily body weight increased by 2.8-16.0%, but the specific consumption decreased by 18.3-23.0%.