L-Theanine is an amino acid derived from green tea leaves. The soothing feeling you may experience with a cup of green tea is largely due L-Theanine. Due to its high bioavailability, L-Theanine is easily able to cross the blood-brain barrier where it functions homologously to glutamate– a key compound needed channel nerve communication in the brain . Within the brain, L-Theanine is reported to boost alpha and theta waves, respectively linked to relaxation and creative processing . Whether you take L-Theanine as a supplement or consume it in your morning cup of caffeine, you may be please surprised by its wide range of benefits to your health, mood, and cognitive processes .