L-theanine is a natural compound found primarily in green tea leaves. It is known for its calming effects, helping to reduce stress and anxiety without causing drowsiness. Many people take L-theanine as a supplement to promote relaxation and improve focus, making it popular among students and professionals alike. Research suggests that L-theanine may enhance the production of alpha brain waves, which are associated with a state of relaxed alertness. This unique ability to promote calmness while maintaining mental clarity makes L-theanine a favored choice for those looking to improve their overall well-being and cognitive performance.