What is Theanine? Theanine is a 100% safe nutrient that is found in high-quality pre workouts. It has been proven to reduce jitters and other negative side effects caused by stimulants like caffeine and is a major component in green tea. It actually almost exclusively occurs in the tea plant. L-Theanine has even been shown to cross the blood-brain barrier, increasing brain concentration and alpha brain waves (α-waves) when supplemented in doses from 50mg to 250mg. If you have ever heard of a nootropic , this is one of them. Nootropics are supplements that can improve cognitive function, memory and other brain functions due to their ability to cross the blood-brain barrier [1]. Alpha brain waves can reduce depressive symptoms, increase creative thinking, and improve relaxation, focus, and wakefulness [2]. If you or someone you know struggles with anxiety or suffers from other side effects when consuming caffeine, consider adding Theanine to the mix. In fact, my mom is o...