What is L-Theanine? L-Theanine is an amino acid, commonly found in tea leaves. In recent years it has become more and more popular for its effects on cognitive enhancement. The supplement form of the substance is extracted and then purified to produce a fine white powder. It is widely known for its ability to promote a sense of calm and relaxation, without producing feelings of sedation. Due to these properties, it is very effective in counteracting the common side effects that are associated with caffeine, such as the 'jitters'. When combining both of these supplements, feelings of wakefulness and focus can be achieved, while still staying very calm and relaxed.
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