L-theanine is a nonessential amino acid that will help improve your attention and mood. This can cross the blood-brain barrier and act as a non-sedative relaxing agent. L-theanine helps the brain relax so it can focus on the tasks at hand without any distractions.
The best part of L-theanine in pre-workout is the synergistic effects with caffeine to prevent jitters and crashes. For example if caffeine was the driver, then L-theanine would be the navigator. There are tons of proven researches behind the science of L-theanine so let PersonalStacks make it easy for you and figure out your best stack.