Manufacturer
Taiyo International
Clinical Studies
40
Certifications
2
Purity
99%+ pure L-isomer theanine via enzymatic fermentation
Last reviewed: 2024-02-10
What Makes It Different
Produced through a patented enzymatic fermentation process that yields pure L-isomer L-theanine, identical to the form found naturally in green tea. Most generic theanine contains a mix of D- and L-isomers.
Technical Specifications
Ingredient Type
L-Isomer L-Theanine
Purity / Standardisation
99%+ pure L-isomer theanine via enzymatic fermentation
Brand Owner
Taiyo Kagaku Co., Ltd.
Country of Origin
Japan
Claims & Positioning
Pure L-isomer only
Clinically validated relaxation
Award-winning ingredient
Clinical Evidence
0 trademark-specific studies · 3 parent (generic L-Theanine) studies shown for context
40+ published studies
Alpha brain wave induction RCT
Caffeine synergy study
Patents & Proprietary Protections
Frequently Asked Questions
What is Suntheanine?
Suntheanine® is a trademarked form of L-Theanine manufactured by Taiyo International. Produced through a patented enzymatic fermentation process that yields pure L-isomer L-theanine, identical to the form found naturally in green tea. Most generic theanine contains a mix of D- and L-isomers.
How is Suntheanine different from generic L-Theanine?
Produced through a patented enzymatic fermentation process that yields pure L-isomer L-theanine, identical to the form found naturally in green tea. Most generic theanine contains a mix of D- and L-isomers.
Who makes Suntheanine?
Suntheanine is made by Taiyo International (Japan); the brand is owned by Taiyo Kagaku Co., Ltd..
How much clinical evidence does Suntheanine have?
SuppIndex lists 40 clinical studies for Suntheanine and 2 certifications (GRAS, Informed Sport). The parent ingredient L-Theanine has an overall evidence score of 72/100 (Moderate).
Parent Ingredient
L-Theanine
A non-proteinogenic amino acid analog of glutamate that crosses the BBB, promoting alpha-wave brain activity and modulating inhibitory neurotransmitter balance.
View the parent ingredient page for full evidence review, dosage guidance, mechanism of action, and safety information.
Products Using Suntheanine®
Common Brands
Manufacturer
Taiyo International
Brand owner: Taiyo Kagaku Co., Ltd.
Japan
Visit WebsiteCertifications (2)
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