γ-Poly-glutamic acid (γ-PGA) is a naturally occurring homo-polyamide produced by various strains of
Bacillus. As a biopolymer substance, γ-PGA possesses a few predominant features containing good water solubility,
biocompatibility, degradability and non-toxicity. Based on this, γ-PGA can be used in pharmaceutical, such as
drug carrier/deliverer, vaccine adjuvant, and coating material for microencapsulation, etc. Moreover, it has also
been applied in a broad range of industrial fields including food, medicine, bioremediation, cosmetics, and agriculture.
Especially, γ-PGA is an extremely promising food ingredient. In this mini-review, our aim is to review
the function and application progress of γ-PGA in the food industry: e.g., improving taste and flavor, enhancing
physical property, and promoting health.