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Pro-pre and postbiotic fermentation of the dietetic dairy matrix with prebiotic sugar replacers

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2023-04-24

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Springer

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Abstract

In this study, bacterial growth, postbiotic short-chain fatty acids (SCFAs) formation, and gelation properties of sugar-free probiotic milk gels produced with stevia and inulin as a sugar replacer and synbiotic interactions were investigated with regard to prebiotic/bio-therapeutic potential and consumer preference. Lactobacillus acidophilus and Bifidobacterium animalis subsp. lactis cultures were used in the manufacture of dietetic milk gels. The addition of stevia and inulin promoted the viability of bacteria and enhanced milk gel firmness throughout its shelf life. The activity of the probiotic bacteria was identified to be within the potential prebiotic effects (> 8.30 log(10) cfu mL(-1)) in a food matrix. However, it was determined that especially stevia and stevia + inulin addition increased the survival rate of probiotic bacteria and in vitro total SCFA production with higher scores for consumers' preferences rather than with the addition of stevia alone. Yoghurts containing B. animalis subsp. lactis have improved the instrumental textural properties, whereas yoghurts containing L. acidophilus had higher scores for sensorial attributes.

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Chain fatty-acids, Stevia-rebaudiana, Beta-glucan, Set yogurt, Growth, Milk, Bifidobacterium, Probiotics, Glycosides, Metabolism, Sugar replacer, Stevia, Inulin, Probiotic, Postbiotic, Science & technology, Life sciences & biomedicine, Biotechnology & applied microbiology, Microbiology, Biotechnology & applied microbiology, Microbiology

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