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About product and suppliers:
        Alibaba.com offers 1,325 tea theanine products. About 33% of these are tea extract, 23% are herbal extract. 

A wide variety of tea theanine options are available to you, such as tea extract, herbal extract. You can also choose from leaf, shell. As well as from bottle, drum. And whether tea theanine is free samples, or paid samples. 

There are 1,320 tea theanine suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Japan, and Hong Kong, which supply 98%, 1%, and 1% of tea theanine respectively. 

Tea theanine products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 451 with ISO9001, 281 with Other, and 135 with GMP certification.