Functional drinks prepared from red dragon fruit peel (Hylocereus lemairei (Hook.) britton and rose) and Catifsh (Clarias gariepinus sp) bone gelatin

Dragon fruit peel extract and catfish bone gelatin are favorable food ingredients enabling to improve physiological functions. The aim of this work was to apply agricultural wastes, i.e. dragon fruit peel and catfish bone, as ingredients for developing functional drink, providing added value to the discarded materials. The drink formulation followed these percentages: dragon fruit extract and catfish bone gelatin (A: 1%, 3%, 5%), sugar (B:10%, 15%) and citric acid (C: 0,5%, 1%, 1.5%), totally resulting in 18 of combined treatments. The results demonstrated that sample 13 A (5%), B (10%) and C (0,5%) showed the most desirable formulation as revealed by its color stability at pH 4 and 5, with total phenol reaching up to 110,82 mg GAE. The selected formula was then tested using hedonic test by 20 panelists. The results of hedonic tests revealed good acceptance for color and taste, but not for aroma.