L-Theanine, for the most part, is a relaxing but not sedating amino acid that is synergistic with stimulants such as caffeine as it can 'take the edge off'. It is effective by itself in the standard supplemental dosages as well, and although it can be attained via a diet high in green tea ingestion that is the only dietary source of L-Theanine.  It is most easily attained through supplementation.  It is a wonderful way to ease yourself through the day withouth drowsiness, remain alert and not allow the little things to keep you from being your best self by increasing your level of attention.

L-Theanine is an amino acid that is not common in the diet (not one of the essential amino acids or even one of the common nonessential amino acids), and is deemed a non-dietary amino acid similar to L-Ornithine or L-Citrulline. L-Theanine has structural similarity to Glutamine and both neurotransmitters that are produced from it (GABA and glutamate) and is known to reach the brain and act in the brain following oral ingestion.

The properties of L-Theanine can be summed up as being a relaxing agent without sedation (relative to something like Lemon Balm which relaxes but may also sedate), and is also implicated in reducing the perception of stress and slightly improving attention. While L-Theanine does not appear to induce sleep, it may (quite weakly) help with sleep although its potency suggests it may not be a good first line treatment for this.

Benefits

• Provides the motivation to have a relaxing and productive day, everyday; without an addiction driving you
• L-Theanine improves attention levels
• Promotes relaxation; reduces stress, but does not induce sleepiness
• L-Theanine naturally takes the edge off without medication and the side effects
• The only food this effect can be benefited from is Green Tea if large amounts are ingested