Development of Symbiotic Added Sucrose-Free Mango Nectar as a Potential Substrate for Lactobacillus casei: Physicochemical Characterisation and Consumer Acceptability During Storage

Alizadeh, A. and Aghayi, N. and Soofi, M. and Roufegarinejad, L. (2021) Development of Symbiotic Added Sucrose-Free Mango Nectar as a Potential Substrate for Lactobacillus casei: Physicochemical Characterisation and Consumer Acceptability During Storage. ACTA ALIMENTARIA: AN INTERNATIONAL JOURNAL OF FOOD SCIENCE, 50 (3). pp. 299-309. ISSN 0139-3006 (print); 1588-2535 (online)

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Abstract

The study was carried out to evaluate the viability of probiotic bacteria as well as physicochemical and sensory characteristics of symbiotic added sucrose-free mango nectar. The mango nectar samples were prepared incorporating different concentrations of inulin and stevia (0, 2 and 4% w/w) and stored for 45 days at 4 °C. The results indicated that the growth of Lactobacillus casei was strongly influenced by the beverage composition. Therefore, the addition of inulin and stevia had a positive effect on the viability of L. casei, especially with 2% w/w inulin or inulin in combination with stevia. However, bacterial viability reduced during storage. According to the results, pH and total soluble solid content of the samples decreased during storage; however, the viscosity values of mango nectars were elevated by the addition of inulin and stevia. Additionally, all beverages were considered a suitable medium to keep the L. casei survival above the minimum recommended value (106–107 CFU mL-1) during storage. In general, it can be concluded that the sample containing 2% inulin and 2% stevia in combination provided the best viability of L. casei with acceptable physicochemical properties and sensory characteristics that could be introduced as synbiotic and low-calorie mango nectar.

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