Tea originated in China, and tea drinking also began in China. With the development of world trade, tea has also become more popular around the world. Nowadays, tea has become one of the three major beverages in the world.
Tea originated in China, and tea drinking also began in China. With the development of world trade, tea has also become more popular around the world. Nowadays, tea has become one of the three major beverages in the world.
The U.S. Food and Drug Administration (FDA) authorized a conditional health claim in 2012 for the relationship between green tea and a reduced risk of cancer. In the early 19th century, the composition of tea was gradually clarified.
There has more than 450 organic chemical components and over 40 inorganic mineral elements were found in the tea by modern scientific separation and identification.
In 1950, Japanese scholar Yajiro Saketo isolated the main substance that produces this flavor from green tea, a non-protein amino acid, and named it theanine. Theanine in tea is all left-handed and is named "L-Theanine" according to the nomenclature.
For a long time, the tea polyphenols and caffeine are the mainly noticed within tea, which are considered to be the main bioactive substances in tea. In recent years, with the continuous deepening of researching, theanine has been increasingly attentioned, especially about the impact of theanine on emotional health. It is also one of the raw materials that has received lots attention in the raw materials of dietary supplements in the United States.
According to the data from major sales channels in the United States in 2021 showed that sales volume of theanine in the sleep health category reached more than 57 million US dollars, compared to 2020, it has increased by 179.6%.