Disclaimer: All research conclusions in this paper are derived from the published academic achievements of the School of Food Science and Technology, Jiangnan University, and are not original experiments of our company. This content is for technical popularization in the food industry only, and does not constitute any product efficacy commitment, dietary recommendation or medical guidance.

Currently, a growing number of studies have moved beyond the conventional understanding of GABA in the food industry. GABA is not only used in relaxation-supporting products (such as gummies and oral liquids), but can also expand its application scenarios by regulating the texture and processing properties of food matrices. Based on two academic studies conducted by the School of Food Science and Technology, Jiangnan University using tapioca starch (tapioca pearls) as a model system, this paper summarizes the general interaction mechanism and application potential between GABA and starch molecules from three dimensions: thermal processing stability, starch system regulation, and digestive release characteristics, providing technical references for the industry.

Potential 1: GABA has excellent thermal stability and is compatible with mainstream thermal processing of starch-based foods

The GABA content shows no significant change after heating GABA solution at 90 °C for 5–20 minutes. GABA remains thermally stable when heated at 80–100 °C for 20 minutes, and its content stays steady at pH 4–6. Therefore, GABA has good stability compatible with mainstream thermal processing technologies for starch foods such as steaming and baking^[1].

On this basis, the research team further solved the problem of GABA loss during the steaming of starch foods via a one-step process to construct a starch-calcium alginate dual network^[2]. Direct addition of calcium alginate and calcium lactate into the tapioca starch matrix reduced the steaming leakage rate of GABA from 36.27% to 15.52%, improving the retention of GABA during thermal processing.

Potential 2: Dual enhancement with a single ingredient: simultaneous optimization of product quality and functionality

In terms of quality optimization, studies confirm that GABA can interact with tapioca starch molecules through hydrogen bonds to inhibit excessive gelatinization and recrystallization of tapioca starch. It not only lowers the breakdown value of starch paste and improves thermal processing stability, but also reduces the retrogradation value of starch paste and delays the aging of the starch system.

In terms of functional upgrading, in vitro simulated digestion experiments show that GABA significantly reduces the proportion of rapidly digestible starch in the starch system. The proportion of resistant starch can be increased from 16.89% to 25.43% at most, while slowing down the in vitro hydrolysis rate of starch, providing a technical approach for the development of low-GI starch foods^[1].

Potential 3: Starch matrices enable steady and sustained release of GABA in the digestive tract

In vitro simulated digestion experiments confirm that pure GABA solution shows almost no release retardation during digestion. In contrast, GABA loaded in a starch matrix is released slowly in the mouth and stomach, with gradual release mainly in the small intestine, showing a remarkable sustained-release effect^[1].

The starch-calcium alginate dual network system can further strengthen the sustained-release performance. The GABA release rate is only 49.73% at 120 minutes of simulated digestion, and exceeds 85% after the full 420-minute digestion cycle^[2].

Future Prospects

The research findings summarized here have verified the regulatory value of GABA in starch matrices using tapioca starch. However, the industrial translation from laboratory models to full-category starch-based foods still faces challenges such as process standardization, multi-matrix adaptation, and large-scale stability, which require in-depth exploration by industry, academia and research institutions.

More importantly, these studies have broken the inherent perception of GABA as only a bioactive raw material. They not only provide new ideas for the upgrading of starch-based foods, but also reveal the untapped potential of GABA in matrix regulation and health-oriented upgrading of more food categories. This value requires joint efforts from industry, academia and research to further promote the application of GABA in the food industry.

References

[1] Zhang Q, Li H, Chiou B S, et al. Adding gamma-aminobutyric acid to modulate the in vitro digestive characteristics of tapioca pearls[J]. Food Bioscience, 2024, 58: 103783.

[2] Yu Z, Zhang Q, Li H, et al. Dual network construction strategy of starch and calcium alginate to prepare tapioca pearls with efficiently embedded gamma-aminobutyric acid[J]. International Journal of Biological Macromolecules, 2025, 311: 143929.