L-Theanine is an amino acid found predominantly in tea nbsp When you have a stressful moment or a shock a cup of tea one of the first things that come to mind but why The reason is thought to be L-Theanine which is believed to promote a calming & relaxing influence If you are a coffee drinker its likely that at some point you will have drunk too much & experienced a hyper effect nbsp It is very doubtful that you have ever experienced the same thing with tea even though it contains a lot of caffeine & the reason why is thought to be theanine It is thought that theanine works to offset caffeines effect but without causing any drowsiness It is also a supplement which is not known to be addictive Pure strong & high grade material Just Vitamins L-Theanine provides 200mg of this high-grade amino acid in a vegetarian capsule