ConclusionsWe have for the first time developed and tested the technology of obtaining the enriched jelly dessert based on the acid whey and citrus fibre.Prepared gelatin was added to the whey heated with sugar to 60 °C. After the gelatin dissolved, juice extracted from oranges and the citrus fibre powder was added. Then citric acid was added and the mixture was stirred constantly for 2 minutes. The mixture was allowed to cool to room temperature, then poured into molds and cooled off.To improve the technological properties of the product, the dietary fibre was swollen in the acid whey mixed with water. The solubility of pectin improved with an increase in temperature.According to the results of the study, the nutritional value of the test sample exceeded the one of the control sample in the content of dietary fibre (which was achieved by adding citric fibre to the jelly) and the content of essential macro- and microelements - Ca, Mg, Zn and P (by replacing water with the acid whey).Adding citrus fibre to the formula increased the density of the dessert, without separation of the liquid. Adding the acid whey gave the dessert a pleasant milk taste, increased sweetness and reduced the sour taste of the jelly.Jelly based on milk whey is recommended for all population groups as a functional product for increasing immunity, especially for people with connective tissue diseases, cardiovascular diseases, high blood pressure, metabolic disorders, and diabetis.Thus, the developed product along with the functional properties had an increased biological and nutritional value and possessed high organoleptic characteristics.