Optimization of wheat dextrin yogurt formulation using response surface methodology.

Area of Science:

• Food Science and Technology
• Dairy Science
• Product Development

Background:

• Yogurt production involves intricate ingredient and process interactions affecting final product quality.
• Wheat dextrin offers potential as a functional ingredient in yogurt formulation.
• Optimization is crucial for achieving desired sensory and physical attributes in yogurt.

Purpose of the Study:

• To optimize the formulation and processing of wheat dextrin yogurt using response surface methodology.
• To determine the optimal levels of wheat dextrin, starter culture, and incubation time.
• To evaluate the impact of these variables on key yogurt characteristics.

Main Methods:

• Response surface methodology (RSM) was employed for experimental design and optimization.
• Ingredient formulation (wheat dextrin, starter culture) and process conditions (incubation time) were varied.
• Key responses including pH, viscosity, syneresis, overall acceptability, L* value, and hardness were measured.

Main Results:

• Optimized wheat dextrin yogurts exhibited a pH range of 4.09-4.98, viscosity of 10,649.5-21,410.1 cP, and syneresis of 2-26.67%.
• Sensory attributes (overall acceptability 5.3-7.9) and physical properties (L* value 81.2-84.3, hardness 506-5943.3 g) were significantly influenced by the variables.
• The RSM model demonstrated high explanatory power (R² > 0.73) for most response variables.

Conclusions:

• The optimal formulation for wheat dextrin yogurt involves 15g of wheat dextrin, 25g of starter culture, and an 8-hour incubation period.
• These optimized conditions result in desirable physicochemical and sensory characteristics for wheat dextrin yogurt.
• RSM is an effective tool for optimizing complex food product formulations and processes.