PREBIOTIC FOOD ADDITIVE PRODUCT MADE OF BLACKBERRY AND RASPBERRY LEAVES AND PROCESS FOR PREPARING THE SAME

The invention relates to a food product and a process for preparing the same. According to the invention, the product comprises 60% concentrated natural extract of blackberry and raspberry leaves and 40% maltodextrins as an excipient for the extract incorporation and drying, having a content of soluble dietetic fibres of 46.5...49.8% and a content of solid substance of at least 90%. The process claimed by the invention consists of the concomitant hydroethanolic solvolysis of pectin polysaccharides, hemicelluloses and bioactive phenol aglycones of the blackberry and raspberry leaves previously washed, dried to a solid substance content of 90% and ground down to a size of 40 mesh, with food ethanol in a concentration of 45...50% v/v, while admixing 0.2...0.3% ascorbic acid for protecting the ethanol groups, at a temperature of 22...25°C, under percolation and pressure shocks condition, for 6 h, followed by extract separation by centrifugation for 15...20 min at 2500 rpm and pressing the remaining solid dispersion in a worm press, the resulting extract being used as such within some food supplements or being subjected to vacuum distillation at 45°C, being mixed with maltodextrins as powder, and the resulting mixture dried by atomization being incorporated as prebiotic additive in some powder food supplements. Invenţia se referă la un produs alimentar şi la un procedeu pentru obţinerea acestuia. Produsul conform invenţiei cuprinde 60% extract natural concentrat din frunze de mur şi zmeur, şi 40% maltodextrine ca excipient de încorporare şi uscare a extractului, cu un conţinut de fibre dietetice solubile de 46,5... 49,8% şi un conţinut de substanţă solidă de minimum 90%. Procedeul conform invenţiei constă din solvoliza hidroetanolică concomitentă a poliozidelor pectinice, a hemicelulozelor şi a agliconilor fenolici bioactivi, din frunzele de mur şi zmeur spălate, uscate la conţinut de substanţă solidă de 90%, şi mărunţite la dimensiuni de 40 mesh, cu etanol alimentar de concentraţie 45...50% v/v cu adăugarea a 0,2...0,3% acid ascorbic pentru protejarea grupărilor etanolice, la 22...25°C, în regim de percolare şi şocuri de presiune, timp de 6 h, urmată de separarea extractului prin centrifugare timp de 15...20 min la 2500 rpm şi apoi presarea dispersiei solide remanente într-o presă cu şnec, extractul rezultat fiind utilizat ca atare în componenţa unor suplimente alimentare sau se supune distilării sub vid la 45°C, se amestecă cu maltodextrine pulbere, iar amest