title: Inulin blend as prebiotic and fat replacer in dairy desserts: optimization by response surface methodology.
abstract: The purpose of this work was to optimize the formulation of a prebiotic dairy dessert with low fat content (<0.1g/100g) using a mixture of short- and long-chain inulin. Response surface methodology was applied to obtain the experimental design and data analysis. Nineteen formulations of dairy dessert were prepared, varying inulin concentration (3 to 9 g/100g), sucrose concentration (4 to 16 g/100g), and lemon flavor concentration (25 to 225 mg/kg). Sample acceptability evaluated by 100 consumers varied mainly in terms of inulin and sucrose concentrations and, to a lesser extent, of lemon flavor content. An interaction effect among inulin and sucrose concentration was also found. According to the model obtained, the formulation with 5.5 g/100g inulin, 10 g/100g sucrose and 60 mg/kg of lemon flavor was selected. Finally, this sample was compared sensorially with the regular fat content (2.8 g/100g) sample previously optimized in terms of lemon flavor (146 mg/kg) and sucrose (11.4 g/100g). No significant difference in acceptability was found between them but the low-fat sample with inulin possessed stronger lemon flavor and greater thickness and creaminess.
authors.affiliation: Instituto de Agroquímica y Tecnología de Alimentos, CSIC, Avda. Agustín Escardino, 7. 46980 (Paterna), Valencia, Spain.
authors.forename: P L
authors.initials: PL
authors.lastname: Arcia
authors.forename: E
authors.initials: E
authors.lastname: Costell
authors.forename: A
authors.initials: A
authors.lastname: Tárrega
mesh_terms: D000818:Animals; D003258:Consumer Behavior; D003611:Dairy Products / Q000032:analysis*; D004041:Dietary Fats / Q000032:analysis*; D005524:Food Technology / Q000379:methods*; D007444:Inulin / Q000737:chemistry*; D056692:Prebiotics; D013395:Sucrose / Q000737:chemistry; D013649:Taste
chemical_list: D004041:Dietary Fats; D056692:Prebiotics; D013395:Sucrose; D007444:Inulin