Legume-based Fermented Foods and Beverages: Nutritional Aspects and Health Implications

Legume-based fermented foods and beverages represent a very rich and diverse category of traditional products across various cultures globally. The fermentation of legumes offers a multitude of benefits, including enhanced nutritional value, improved digestibility, and unique flavour profiles. This chapter explores the fermentation processes, microbiological, and health implications associated with legume-based fermented foods and beverages. In traditional food processing, legumes such as soybeans, lentils, chickpeas, and mung beans are subjected to fermentation by autochthonous microorganisms. The fermentation process involves the breakdown of complex macromolecules such as proteins and carbohydrates into simpler, more bioavailable forms. Microorganisms such as Bacillus species, lactic acid bacteria (LAB), and yeast play key roles in these transformations, producing enzymes that degrade anti-nutritional factors and enhance nutrient bioavailability. The resulting fermented products range from Asian soy-based condiments such as miso and tempeh to African condiments that include dawadawa and ugba. These products are prized for their rich flavors and nutrient supplies and their probiotic properties, which contribute to gut health and overall well-being. Moreover, fermentation imparts unique sensory characteristics to legume-based foods, making them culturally significant and widely enjoyable. The potential health benefits of legume-based fermented foods and beverages such as cholesterol reduction, blood sugar regulation, and immune system modulation due to the activities of the bioactive compounds present are discussed in this chapter. Understanding the complex interactions between microorganisms and substrates during fermentation is crucial for optimizing processes and developing novel products with enhanced functionality. This chapter also highlights the importance of legume-based fermented foods and beverages as nutritious, flavorful, and culturally significant components of global cuisine.