Does l-theanine work?
Overall Effectiveness Rating for L-Theanine
The overall effectiveness rating for l-theanine is 2 out of 3. This rating means there is some evidence that using l-theanine may lead to positive results. This rating also means that some evidence does not back up all claims. Below you can find individual ratings for specific claims.
Overall Confidence Rating for L-Theanine
There are 4 studies in the database on l-theanine; the confidence rating is 20. A score above 80 means the effectiveness rating for this supplement is reliable. A score under 80 means there is insufficient evidence to ensure a reliable effectiveness rating. Note, this rating is for l-theanine as a whole. There are also individual ratings for the claims below.
Products Containing L-Theanine
The overall ratings above do no necessarily reflect each claim about l-theanine. Individual claims can have higher or lower ratings. For example, some supplements may have a lot of backing for one claim, but be completely useless for another. Click on claims below for more information.