Suntheanine® is the trade name for Taiyo’s award winning isomerically pure L-theanine produced via a patented fermentation method.

Suntheanine is easily incorporated into foods, beverages and supplements, with no negative impact on taste, color or stability of the product. Suntheanine is Kosher, Halal, and GMO Free. Since 1994, Suntheanine has been safely consumed in beverages, foods and supplements.

Suntheanine has GRAS affirmation based on safety and toxicity studies conducted specifically on the brand, with FDA Letter of No Objection (GRN000209) and regulatory approval in numerous other countries.

Based on clinical studies conducted specifically on the brand, Suntheanine improves focus, attention and clarity, reduces the negative effects of caffeine, improves quality of sleep, and promotes a calming, relaxing experience within the range of 50 to 200 mg. Effects can typically be felt within 20 to 30 minutes.

Trust Suntheanine to consistently meet the high quality standards your products demand based on our clinical research, safety support, international patents, and consumer brand recognition.