L-theanine is a key ingredient in Adapt Relax. It is an amino acid that is not common in the diet which promotes relaxation without drowsiness.
It is found in meaningful amounts in tea but tea also contains caffeine which isn’t something you always want to be consuming when you are trying to relax! Other than tea, supplementation is the main source of L-theanine in the human diet.
There are numerous rigorous studies that highlight the positive effect L-theanine can have in terms of relaxation and managing stress.
Evidence from human electroencephalograph (EEG) studies show that it has a direct effect on the brain (Juneja et al. Trends in Food Science & Tech 1999;10;199-204). L-theanine significantly increases activity in the alpha frequency band which indicates that it relaxes the mind without inducing drowsiness. 
One bottle of Adapt Relax contains 100mg of L-theanine a much higher does than that is typically found in a cup of black tea (approximately 20mg). And this is double the 50mg L-theanine per day that was given to participants in the above study.
In another study they used a randomised, placebo-controlled, crossover, and double-blind trial to examine the possible effects of four weeks L-theanine administration on stress-related symptoms and cognitive functions in a group of 30 healthy adults. L-theanine (200 mg/day) or placebo tablets were randomly and blindly assigned for the four-week period. The study concluded that L-theanine has the potential to promote mental health in the general population with stress-related ailments and cognitive impairments. .
We have added L-Theanine to Adapt Relax to help you relax and de-stress at the end of your day. Combined with the other powerful ingredients in Adapt Relax it is a fantastic alcohol free way to help you relax at the end of the day.