Bacterial and Fungal Fermentation to Improve the Nutritional Value of Legumes: Opportunities in the Development of Sustainable Plant Proteins

Abstract

Purpose of Review This review explores the transformative role of fermentation as a sustainable biotechnological strategy to enhance the nutritional and techno-functional value of legumes. As global demand for alternative plant proteins grows, understanding how microbial pathways can overcome inherent challenges, such as poor sensory attributes and anti-nutritional factors, is essential for developing high-quality, clean-label ingredients. Recent Findings Recent research highlights the efficacy of different fermentation regimes, including submerged, solid-state, semi-solid, and sequential systems, in tailoring legume properties. Studies demonstrate that bacterial and fungal consortia significantly reduce anti-nutritional factors like phytates and tannins, improving mineral bioavailability and protein digestibility. Furthermore, microbial metabolism effectively masks undesirable “beany” off-flavors by degrading aldehydes and synthesizing complex aroma compounds, such as umami and nutty profiles. Advanced bioprocesses are also being utilized to modify protein structures, enhancing solubility and emulsification for next-generation meat and dairy analogues. Summary Legume fermentation has evolved from artisanal practices to a precise tool for nutritional improvement. By integrating various fermentation types and microbial strategies, the food industry can transform underutilized legumes into nutrient-dense, functional ingredients. This multi-scale transformation not only aligns with global sustainability goals but also facilitates the creation of sensorially appealing, health-promoting plant-based foods that outperform their raw counterparts.