1. Tea beverage quality improver

2. Functional food additives

Theanine can enhance brain function α Wave intensity can make people feel relaxed and improve memory, which has been confirmed by human experiments. Therefore, it can be added to food as a functional component to develop functional food to alleviate nervous tension and benefit intelligence. For example, black tea concentrated extract (Bx=20) 5%, sugar (Bx=7.5) 5%, granulated sugar 15%, gel 1%, theanine 0.2%, citric acid 0.2%, sodium citrate 0.2%, and water to 100% make black tea jelly. Brain waves were measured after 60 minutes of eating, once every 5 minutes. The results showed that after eating α The amount of wave increased immediately and increased significantly after 30 minutes, up to 1.6 times. The study also confirmed that theanine added to candy and various drinks can obtain good sedative effect. Japan is actively carrying out research and development in this regard.

Theanine can not only be used as a flavor improver of green tea, but also inhibit the bitterness and astringency in other foods to improve food flavor. Cocoa beverage and wheat tea have unique bitter or astringent taste, and the addition of sweetener will have an unpleasant taste. If 0.01% theanine is used to replace the sweetener, the results show that the flavor of the beverage is greatly improved after the addition of theanine. The study also confirmed that theanine added to other foods (coffee, cocoa, ginseng drinks and beer) also has a good effect on improving the flavor, indicating that theanine has a broad application prospect in the food industry.