Found InGreen Tea Leaves
SupplierNutriScience Innovations, LLC
Final Location of ManufacturingHonam, South Korea
FunctionDietary Ingredient


Supports a non-drowsy sense of calm*

Supports stress relief*

Suntheanine® is a form of L-Theanine and has been clinically shown to support quick stress relief within the hour and provide a non-drowsy sense of calm.*

Evidence-Based or Bust

We use nutrients backed by a significant body of research that is growing every day. Of the thousands of unaffiliated studies our in-house scientists sorted through to guide our choices, the titles below are some relevant MVPs.


Effects of L-Theanine Administration on Stress-Related Symptoms … in Healthy Adults: A Randomized Controlled Trial. - 2019


There are 42 studies on L-theanine and counting

Substantiation is a living, breathing thing. We are constantly reviewing new research. Have a study you think we should take a look at? Send it our way: [email protected]

Find Your Ritual