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L-Theanine is a unique free amino acid in tea, and theanine is glutamic acid γ-ethylamide. Theanine content varies with the variety and location of tea. Theanine accounts for 1% to 2% of the dry tea. Theanine is a white needle, soluble in water.



【Product Name】L-Theanine

【Appearance】White Powder

【Molecular Formula】C7H14N2O3

【Molecular Mass】174.2

【CAS No】3081-61-6  


Description Of L-Theanine

L-Theanine is derived from tea leaves. Tea is native to eastern Asia and is a member of the Theaceae family. This evergreen shrub or tree grows to over 9 m in height and is pruned from 60 cm to 1.5 m for cultivation. Its dark green, serrated-edged leaves are alternate and oval, while its white and fragrant blossoms appear singly or in clusters.

AppearanceWhite Crystalline PowderConforms 
Specific Rotation[α]20/D+7.7°~+8.5°+8.1°
Chloride (as CL)   ≤0.02%<0.02%
Loss on drying≤0.20%0.11%
Residue on ignition≤0.10%0.06%
Heavy metal(Pb)        ≤10ppm<10ppm
Arsenic  ≤1ppm<1ppm

Function Of L-Theanine

L-Theanine has mood-modulating activity,anti-cancer,diminishing symptoms of PMS,improving learningperformance,heightening mental acuity-neurotransmitter,promoting concentration,acting antagonistically against the paralysis induced by caffeine,supporting the immune system,lowering blood pressure,increasing brain dopamine levels among others.

Application Of L-Theanine

1. Pharmaceutical raw materials

2. Food and Drink for health care

3. Food additive  


【Storage】Stored in sealed containers at cool & dry place. Protect from light, moisture and high temperature.



L-Theanine suppliers

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