Some of the natural supplements that have similar action to L-theanine are: Gaba, Glutamine and Tryptophan. However, the ingestion of these supplements is only effective during sleep, so it is necessary to ingest them before bedtime.
L-theanine, on the other hand, promotes instant relaxation. But the main difference between L-theanine and other calming drugs is the fact that theanine has no sedative effect, which allows its use even in situations that require focus and attention, such as when studying or working.