L-theanine is an amino acid responsible for the sense of calm alertness associated with green tea.* Optimal results require the best L-theanine you can find... which is why Suntheanine® L-Theanine 200 is produced by a special enzymatic fermentation process, resulting in a product that mimics the natural process in green tea leaves. That means you get a patented and highly active form (98% pure) of L-theanine.
NaturesPlus PRO: Nature + Science= PROformance—professional-level products from NaturesPlus!