Fermented legume formulation with enhanced protein digestibility

Overview

This solution centers on a multifunctional fermented legume formulation developed using a specifically selected Leuconostoc strain (Leuconostoc pseudomesenteroides K5) isolated from kefir grains adapted to legume infusions. The product targets the growing demand for plant-based functional foods by delivering multiple nutritional and health benefits in a single fermented matrix, including enhanced protein digestibility, vitamin enrichment, removal of indigestible sugars, and gut health support.

The value proposition addresses key limitations of plant protein consumption, such as lower amino acid bioavailability compared to animal proteins, while adding functional properties that appeal to health-conscious consumers, athletes, and aging populations seeking improved protein utilization.

Technical specifications

Core technology features:

• Selected LAB strain: Leuconostoc pseudomesenteroides K5, isolated and characterized over 15+ years of lactic acid bacteria research
• Protein hydrolysis capability: Naturally produces peptidases that break down vegetal proteins, increasing amino acid absorption
• Oligosaccharide metabolism: Complete removal of flatus sugars (raffinose, stachyose) commonly found in legumes
• Vitamin biosynthesis: Enrichment in B vitamins and vitamin K during fermentation
• Exopolysaccharide production: Contributes to texture and potential prebiotic effects
• Isoflavone enhancement: Demonstrated ability to increase estrogenic activity of isoflavones in soy-based fermentations
• Safety profile: Comparative genomics confirmed absence of virulence factors and transmissible antibiotic resistance genes (ISO10932 IDF223 protocol)
• Detection capability: Strain-specific qPCR protocol for quantification of viable or inactivated cells

Proposed formulation: Water infusions of soybeans, peas, or beans supplemented with rice proteins to optimize amino acid profile, with microbial inactivation via mild pasteurization or gamma irradiation to preserve bacterial peptidase activity.

Technology readiness level

The technology is currently at an advanced laboratory validation stage. The K5 strain has been isolated, characterized, and demonstrated to perform key functions including protein hydrolysis, oligosaccharide metabolism, vitamin synthesis, and exopolysaccharide production. Safety assessment via comparative genomics and antimicrobial susceptibility testing has been completed.

Future validation plans include establishing optimized fermentation protocols for specific legume formulations, in vitro characterization of finished products, and a placebo-controlled, randomized, double-blind crossover study with 15-20 healthy volunteers to confirm increased amino acid absorption. The estimated timeline for completing validation is approximately one year. The research team at Università degli Studi di Milano is positioned to advance this technology toward commercial food applications through industry partnerships.