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Developement and characterization of high protein plant-based yogurt
Smatana, Igor ; Vítová, Eva (oponent) ; Pořízka, Jaromír (vedoucí práce)
The thesis was focused on the production and characterization of plant-based yogurts with increased protein content. The aim was to design and optimize the formula of new plant-based products. The motivation for this work was the ever-increasing demand for plant-based food alternatives in recent years. The theoretical part was focused on the trend of development of dairy alternatives as well as the nutritional challenges associated with modern diets such as vegetarianism and veganism. Focus was also on the nutritional importance of protein and the composition of proteins of plant origin. The impact of live bacteria on human health, as well as common analytical methods for determining rheological and sensory properties was also included. In the experimental part, the methods used for the preparation and characterization of novel plant-based high-protein yogurts were described. The results showed that the biggest challenge in the production of plant-based yogurts, without added stabilizing agents, is to achieve an acceptable texture, so that the products are neither too watery nor too tough, while maintaining suitable sensory properties. For the products with the addition of 20 g of almond protein, this texture was almost achieved, while maintaining the appropriate sensory characteristics. In contrast, for products containing 10 g almond protein and 6 g of pea or rice protein, the texture was unacceptable and the products were splitting into 2 phases.
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