Suntheanine® (Original, High Purity, GRAS-Affirmed L-Theanine)



In today’s fast-paced society, a large portion of the adult population experiences some form of stress during their daily life. Since ancient times, it has been said that drinking green tea induces relaxation. It has been found that this relaxation effect can be attributed to the presence of the amino acid L-Theanine.


Suntheanine® is the trade name for our patented high purity L-isomer-specific L-Theanine (chemical name: L-glutamic acid-y-monoethylamine), a unique amino acid found in tea (Camellia sinensis). Suntheanine® is produced via a patented enzymatic method, resulting in an isomerically pure L-Theanine.


Suntheanine® is the original, patented, and consumer recognized high purity L-isomer-specific L-Theanine; an award-winning and patented dietary ingredient for stress, relaxation, focus and improved sleep efficiency, which is currently used around the world by food, beverage, dietary, animal health and sports nutrition brands.

What the Science Shows


Suntheanine® is the original researched and patented form of L-Theanine. All original published scientific studies, clinical trials, and safety/toxicity studies were conducted specifically using Suntheanine® brand L-Theanine; which is L-Theanine manufactured specifically using Taiyo’s original, and ground-breaking proprietary manufacturing process.


Clinical trials have shown Suntheanine® promotes an alert state of relaxation without drowsiness, enhances sleep quality, and improves focus and concentration, as indicated by an increase in Alpha brain waves, and a decrease in Beta brain waves.


Additional human clinical research suggests that Suntheanine® may have application in improving the quality of sleep, diminishing normal symptoms of premenstrual syndrome (PMS), improving learning performance, heightening mental acuity, promoting concentration, reducing negative side effects of caffeine and supporting the immune system.


Suntheanine® is absorbed through the brush-border membrane in the large intestine and transported directly to the brain where it stimulates the generation of Alpha brain waves.

Suntheanine® brand L-Theanine is a registered trademark of Taiyo International, Inc. and
is exclusively supplied by NutriScience Innovations, LLC.

For more information on Suntheanine®,
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Structure/Function Claims for Suntheanine®: 


Backed by peer reviewed studies, numerous claims have been deemed acceptable for Suntheanine®, including:

  • Improves focus, attention, learning performance and mental clarity
  • Reduces stress and promotes relaxation without drowsiness
  • Improves quality of sleep
  • Reduces negative side effects of caffeine
  • Diminishes the normal symptoms of premenstrual syndrome (PMS)
  • Promotes focus and concentration


Additional human clinical research suggests that Suntheanine® may have application in:

  • Improving the quality of sleep
  • Improving learning performance
  • Heightening mental acuity
  • Promoting concentration
  • Reducing negative side effects of caffeine
  • Supporting the immune system

Trust Suntheanine®


With extensive clinical research, unparalleled safety support, several international patents, and consumer brand recognition, you can trust Suntheanine® to consistently meet the high quality standards your food, beverage and supplement products demand.


Suntheanine® is approved for use in a number of food and beverage categories including juices, teas, sports beverages, carbonated beverages, energy drinks, and specialty and nutrient enhanced water.


Suntheanine® is Non-GMO, Food Grade, Gluten-Free, and meets Kosher & Halal requirements.


Suntheanine® has been used for years in a very wide range of applications:


· Dietary Supplements

· Functional Foods & Beverages

· Enhanced Water

· Candies and Gums

· Brain/Mood Health Formulations

· Sports & Performance Formulations

· Animal Health Products

Suntheanine® is Generally Recognized as Safe (GRAS) &
is Non-GMO Project Verified.

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