Effect of γ‐aminobutyric acid on the physicochemical, rheological and sensory properties of yoghurt
2015
Liu, Mingying | Wang, Yaosong | Jiang, Lihua | Xia, Quanming | Qiu, Yongjun | Fan, Liqiang | Zhou, Jiachun | Zhao, Liming
This study aimed to investigate the impacts of dairy processing conditions on the γ‐aminobutyric acid (GABA) content and the effect of GABA on the quality of the resulting yoghurt. Serial concentrations of GABA (0.05–1.0%, w/w, milk basis) were designed during the preparation of yoghurt. Colour and physicochemical and rheological properties of yoghurt were also examined. The results indicated that the fermentation process had no significant influence on GABA content. The GABA level greatly improved the texture properties of the resulting product at a concentration of 0.5% (w/w), whereas higher GABA concentrations impaired the texture. The lightness (L) value of yoghurt also increased in line with the GABA concentration.
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