Many consider it the best nootropic when combined with caffeine for the synergistic effect of lowering blood pressure, rejuvenate and relax, boost thinking ability, improve focus and change your mood.  Since it easily crosses the blood-brain barrier, L-Theanine works quickly to increase dopamine and serotonin. The “feel good” chemicals in your brain.Caffeine jitters are reduced when combined with L-Theanine.Dosing L-Theanine as a nootropic is 250 – 500 mg and it is water soluble.L-Theanine is an amino acid which naturally occurs in green tea and oolong tea.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.