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  • L-Theanine

L-Theanine

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Cognitive Support
Stress & Mood Support
Amino Acid
Non-Essential Amino Acid

Common Names: Theanine, L-Theanine, Gamma-Glutamylethylamide, 5-N-Ethyl-Glutamine

Scientific Names: N5-ethyl-L-glutamine

Summary

L-Theanine, a naturally occurring amino acid primarily found in tea, particularly green tea, was first discovered in 1949 and later isolated from gyokuro leaves in 1950. Constituting about 1–2% of the dry weight of green tea leaves, L-Theanine imparts a unique brothy or savory (umami) flavor to green tea infusions. While the European Food Safety Authority found insufficient evidence for a direct link between theanine consumption and cognitive function improvement, stress alleviation, normal sleep maintenance, or reduction of menstrual discomfort, emerging research suggests potential benefits. L-Theanine supplementation, whether extracted from tea or chemically synthesized, has shown promise in reducing stress and anxiety, preventing stress-induced blood pressure increases, and enhancing some aspects of cognitive function, including attention and memory. Additionally, there is evidence supporting its potential to improve sleep quality by promoting a relaxed state in the brain, although more research is needed, especially regarding its effects on individuals with chronic conditions.

Dosage Recommendations
While the optimal dosage can vary based on the desired effect and individual differences, many studies have used dosages ranging from 100-200mg. However, it's always recommended to follow the dosage instructions on any supplement product or to consult with a healthcare professional.
Scientific Papers
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