Metabolic Modulation of Yogurt Fermentation Kinetics and Storage Stability by Lactobacillus-Starter Culture Interactions

Lactobacillus-enriched yogurt is in increasingly high demand due to its health benefits, but the product stability requires an understanding of the microbial dynamics during fermentation and storage. This study investigated the interactions between probiotic pairs (L. paracasei L9 and L. acidophilus LAC) and starter culture (HYY) through fermentation kinetics, microbial viability, organic acid profiles, and metabolomics. The results demon- strated that L. paracasei L9 significantly increased...