Exploring prebiotic properties and its probiotic potential of new formulations of soy milk-derived beverages
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Date
2024-07
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Abstract
Introduction: The food and beverage industry has shown a growing interest in plant based beverages as alternatives to traditional milk consumption. Soy milk is derived
from soy beans and contains proteins, isoflavones, soy bean oligosaccharides, and
saponins, among other ingredients. Because of its high nutritive value and versatility,
soy milk has gained a lot of attention as a functional food.
Methods: The present work aims to explore the prebiotic properties and
gastrointestinal tolerance potential of new formulations of soy milk-derived
drinks to be fermented with riboflavin-producing probiotic Lactiplantibacillus
plantarum MTCC (Microbial Type Culture Collection and Gene Bank) 25432,
Lactiplantibacillus plantarum MTCC 25433, and Lactobacillus acidophilus NCIM
(National Collection of Industrial Microorganisms) 2902 strains.
Results and discussion: The soy milk co-fermented beverage showed highest
PAS (1.24 ± 0.02) followed by soy milk beverages fermented with L. plantarum
MTCC 25433 (0.753 ± 0.0) when compared to the commercial prebiotic raffinose
(1.29 ± 0.01). The findings of this study suggested that the soy milk beverages
exhibited potent prebiotic activity, having the ability to support the growth of
probiotics, and the potential to raise the content of several bioactive substances.
The higher prebiotics activity score showed that the higher the growth rate
of probiotics microorganism, the lower the growth of pathogen. For acidic
tolerance, all fermented soy milk managed to meet the minimal requirement of
106
viable probiotic cells per milliliter at pH 2 (8.13, 8.26, 8.30, and 8.45 logs CFU/
mL, respectively) and pH 3.5 (8.11, 8.07, 8.39, and 9.01 log CFU/mL, respectively).
The survival rate of soy milk LAB isolates on bile for 3 h ranged from 84.64 to
89.60%. The study concluded that lactobacilli could thrive in gastrointestinal
tract. The sensory evaluation scores for body and texture, color, flavor, and
overall acceptability showed a significant difference (p < 0.05) between the
fermented probiotic soy milk and control samples. Soy milk fermented with a
combination of L. plantarum MTCC 25432 & MTCC 25433 demonstrated the
highest acceptability with the least amount of beany flavor. The findings of the
study suggest soy milk’s potential in plant-based beverage market.