FIELD: food industry.SUBSTANCE: inventions group relates to biotechnology. The ballast substance as a food additive for the human and animals with a monolocular stomach contains a fibre composition including the following components: lignocellulose, a fermentable fibre ingredient (bark material of soft wood, hardwood or their mixtures) and a marginally fermentable or non-fermentable fibre ingredient (fibres of soft wood, hardwood and their mixtures) at a ratio of 1:100 - 100:1, isoquinoline alkaloids. The ballast substance is produced and purified impurities are removed at stage (a). The components are dried till dry substances content is equal to 3-12% at stage (b), milled, strained at stage (c) and mixed. The mixture is pressed at stage (d) and milled into desired size particles and mixed at stage (e). One adds a vegetable material containing isoquinoline alkaloids before pressing at stage d) and before mixing the ground components at stage (e). According to the second version of the method isoquinoline alkaloids are added at the stages of mixing (iv) or pressing and grinding at stage (v). The ballast substance is included in the composition of a fodder (in an amount of 0.01 - 50 % of the total fodder weight) and a fodder premix (up to >99%). The ballast substance is applied as a food additive in human alimentation, as a fodder or food additive for weight reduction.EFFECT: inventions group ensures satiation effect enhancement and appetite loss.9 cl, 9 tbl, 7 exГруппа изобретений относится к биотехнологии. Балластное вещество в качестве пищевой добавки для человека и животных с однокамерным желудком содержит композицию волокон, в состав которой входят: лигноцеллюлоза, ферментируемая волокнистая субстанция (корный материал древесины мягких пород, твердых пород или смесей из них) и плохо ферментируемая или неферментируемая волокнистая субстанция (волокна древесины мягких пород, древесины твердых пород и их смесей) в соотношении от 1:100 до 100:1, изохинолиновые алкал