FIELD: food-processing industry. SUBSTANCE: method involves holding raw plant material in water and providing partial or complete freezing, with following partial defrosting and juice squeezing; introducing into water preparation produced by sequential extracting of Mortierella alpina micromycet biomass with the use of non-polar extractant in above-critical state, water, alkaline, water, acid, water, alkaline, and water, with following joining of first extract with solid residue and holding for 2-5 hours, said preparation being used in an amount of 0,5-1•104 mg/t. EFFECT: improved quality of final product. 2 ex
