GABA tea

Anaerobic treatment is the key step for manufacturing GABA tea. The basic procedures for manufacturing GABA tea with different degrees of fermentation are shown in figure 4.2. ... 

Anaerobic fermentation is the key step of manufacturing GABA tea. However, it is important to know what kind of gas should replace oxygen. Tsushida et al. have... 

FIGURE 4.2 Basic procedures for manufacturing GABA tea with different degrees of fermentation. 

GABA tea made using these four varieties with an anaerobic fermentation-withering repeating process was greater than 150 mg%, for partial fermentation type of tea also reaches the commercial level of GABA. 

GAD is the key enzyme for GABA formation from glutamate. The optimal activity temperature of 40°C and pH of 5.8 were reported by Streeter and Thompson in 1972 82 jjj Japan, Takeuchi et reported that higher N2 treatment temperature could result in the increase of GABA content. The incubation temperatures of 4, 25, and 37°C did not affect the changes in the amino acids of GABA tea, except that the... 

Since the higher the GABA content in GABA tea, the higher the price of the GABA tea, many new techniques for enhancement of GABA content in GABA tea have recently been developed. -" Some of them are discussed below. 

FIGURE 4.4 The effect of GABA tea extract on systolic blood pressure of SHR. (From Omori, M., Yano, T., Okamoto, J., Tsushida, T., Murai, T., and Higuchi, M. 1987. Effect of anaerobically treated tea (Gabaron tea) on blood pressure of spontaneously hypertensive rats. Nippon Nogeikagaku Kaishi 61 1449-51. With permission.)... 

SHRSP rats without the GABA tea feeding all died after 14 weeks due to stroke or kidney dysfunction, while those fed with GABA tea were all alive. 

In 2005, Ou et al. evaluated the effectiveness of the hypertension moderation and bioactive functions of Taiwan GABA tea by component analysis and animal tests. The bioactive components of GABA tea and green tea produced in Taiwan were... 

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