FIELD : nanotechnologies; medicine; food industry.SUBSTANCE : invention relates to nanotechnology, medicine and food industry. Method of producing guarana dry extract nanocapsules is characterized by that guarana dry extract is added to a suspension of guar gum in petroleum ether in presence of 0.01 g of glycerol ester with one or two molecules of edible fatty acids and one or two molecules of citric acid as a surfactant substances while stirring at 800 rpm, then 6 ml of acetonitrile is added; the obtained suspension of nanocapsules is filtered and dried at room temperature; the weight ratio of core to shell is 1 : 1, 1 : 2 or 1 : 3.EFFECT : disclosed is a method of producing nanocapsules of dry guarana extract.1 cl, 3 ex