Question: what is the difference between l-theanine and suntheanine?
Answer: The main difference between these two forms is probably bioavailability<11>. L-Theanine is a plain form which can readily be obtained by drinking a cup of tea. On the other hand, Suntheanine® is a patented and branded form of L-Theanine which is able to provide a concentrated form of L-Theanine.