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About product and suppliers:
        Alibaba.com offers 1,546 l theanine products. About 23% of these are tea extract, 19% are herbal extract, and 1% are antioxidants. 

A wide variety of l theanine options are available to you, such as leaf, seed, and shell. You can also choose from green tea extract, aloe vera extract, and marigold extract. As well as from free samples. 

There are 1,534 l theanine suppliers, mainly located in Asia. The top supplying countries are China (Mainland), United States, and Japan, which supply 97%, 1%, and 1% of l theanine respectively. 

L theanine products are most popular in North America, Western Europe, and South America. 

You can ensure product safety by selecting from certified suppliers, including 445 with ISO9001, 272 with Other, and 120 with GMP certification.