Enrichment of gluten-free cereal bars based on expanded grain with functional ingredients of secondary products processed from black currant berries

Objective. To study the influence of functional components of the chemical composition of secondary products processed from black currant berries on the nutritional value of gluten-free cereal bars based on expanded grain and to establish the possibility of satisfying the daily requirements of vitamin C, bioflavonoids, dietary fiber, including pectin, in children when using them. Materials and methods. The objects of the study were expanded grains of millet, rice, buckwheat, amaranth, quinoa, as well as the powder obtained from black currant pomace. When studying the content of substances that determine the nutritional and biological value of black currant pomace powder, standard research methods were used. The nutritional value of gluten-free cereal bars was estimated by the calculation method. Results. The chemical composition of black currant pomace powder was studied. It was found that it contains a large amount of ascorbic acid (139.2 mg/100g) and bioflavonoids: anthocyanins (1381.1 mg/100 g), leuco-anthocyanins (864.9 mg/100 g), and catechins (739.4 mg/100 g). It is characterized by a high ratio of sugars and acids (4), as well as a high content of pectin substances and fiber (11.5 and 10.7%, respectively). The calculation of nutritional value showed that the addition of black currant pomace powder in the recipe of gluten-free cereal bars in an amount of 3.5% or more at the consumption of 100 g of the finished product can cover the daily requirements of children in bioflavonoids and dietary fiber, and an amount from 7.0% of the recipe allows to get a product enriched with vitamin C. Conclusion. The calculations of daily requirements performed in this study indicate the prospects of using black currant pomace powder as an enriching additive in specialized products for children over 3 years of age with gluten intolerance. Key words: gluten-free foods, children, cereal bars, gluten intolerance, expanded grain, black currant powder, biologically active substances