Mixed Fermentation with Saccharomyces cerevisiae and Lactobacillus Species Reduces Sugar Content and Enhances Flavor in Pumpkin Juice

A recent study examined the impact of mixed fermentation involving *Saccharomyces cerevisiae*, *Lactobacillus helveticus*, and *Lactobacillus delbrueckii subsp. bulgaricus* on the physicochemical properties and flavor profile of pumpkin juice. Researchers analyzed how this combination of microorganisms influenced factors such as acidity, sugar content, volatile compounds, and overall sensory characteristics of the juice.

The findings revealed that the mixed fermentation process significantly altered the chemical composition of pumpkin juice. The pH levels decreased due to increased lactic acid production, while sugar content was reduced as a result of microbial metabolism. Additionally, the fermentation process enhanced the formation of volatile compounds associated with improved flavor profiles, including esters and alcohols. Sensory analysis indicated that these changes contributed to a more favorable taste perception among participants. The study highlights how specific microbial combinations can modify both nutritional and sensory attributes in plant-based beverages like pumpkin juice.

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Date: November 28, 2025

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