The invention relates to dietary and prophylactic biologically active food additives (BAAs), in particular, those consisting of plant raw materials, and to processes for producing the same; it can be used as a food additive for humans and domestic animals to reduce blood cholesterol levels, to stimulate protein glycosylation and to prevent infectious and cardiovascular diseases. The technical result of the use of the claimed BAA consists in providing a means for reducing blood cholesterol levels, stimulating protein glycosylation and preventing infectious and cardiovascular diseases. The biologically active additive comprises at least one polyprenyl phosphate or polyprenyl pyrophosphate with from 7 to 30 isoprene units or a mixture of different polyprenyl phosphates and polyprenyl pyrophosphates adsorbed on a solid sorbent, in particular sorbitol, lactose, starch, and also beta-sitosterol. The biologically active additive is produced by dissolving a mixture of polyprenyl phosphates and/or polyprenyl pyrophosphates in an organic solvent, adding a sorbent to the obtained solution and subsequently mixing and removing the solvent by distillation. Beta-sitosterol can be added along with the sorbent.