Poly-γ-gamma glutamic acid (γ-pga) coating for enhanced probiotic stability
Poly-γ-gamma glutamic acid (γ-PGA) is proposed as a protective coating for probiotics, enhancing their stability and bioavailability in food and beverage applications. This biodegradable polymer improves probiotic survival in acidic conditions and may also protect tooth enamel.
Overview
Poly-γ-gamma glutamic acid (γ-PGA) offers a novel solution for improving the stability and bioavailability of probiotics in various food and beverage products. Probiotics face significant challenges in maintaining viability during storage and through the digestive process, which can impact their health benefits. By using γ-PGA as a protective coating, probiotics can survive better in acidic environments such as juices and stomach conditions, thus enhancing their effectiveness.
Technical specifications
- Biodegradable polymer: γ-PGA is safe for human consumption (GRAS) and acts as a cryoprotectant.
- Stability enhancement: Proven to improve the survival of probiotics in orange and pomegranate juices and in simulated gastric juice.
- Potential additional benefit: May protect tooth enamel when introduced into low pH beverages.
Technology readiness level
The technology is currently at TRL 3, having demonstrated successful results in laboratory settings. Further validation is planned over the next 6-12 months to test a wider range of probiotic strains and assess long-term stability and potential degradation issues.
About University of Wolverhampton
University of Wolverhampton is a large, comprehensive public university with more than 24,000 students across campuses in Wolverhampton, Walsall and Telford, and a strongly regional, applied character. Its Black Country location places it close to the West Midlands industrial ecosystem, while Wolverhampton Science Park offers business space, incubation and innovation facilities. Research centres, industrial advisory boards, placements, degree apprenticeships and Knowledge Transfer Partnerships provide practical routes for companies to engage with academic expertise and talent. Research receives competitive support from UK Research and Innovation, including Innovate UK and the Economic and Social Research Council, alongside health-sector and other public funders. Enterprise support helps organisations develop collaborations and commercialisation pathways.
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