FIELD : nanotechnology. SUBSTANCE : invention relates to nanotechnology, medicine and food industry. Method of producing nano-capsules of dry extract of red brush is characterized by that dry extract of red brush is added to suspension of sodium alginate in methanol in presence of 0.01 g of glycerol ester with one or two molecules of food fatty acids and one or two molecules of citric acid as surface- active substance while stirring at 800爎pm, acetonitrile is then poured, the resulting nanocapsule suspension is filtered and dried at room temperature, with the core : shell mass ratio being 1 : 1, 1 : 2 or 1 : 3. EFFECT : disclosed is a method of producing nanocapsules of dry extract of a red brush. 1 cl, 3 ex