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SMB00395

Sigma-Aldrich

L-Theanine

≥98% (HPLC)

Synonym(s):

Nγ-Ethyl-L-glutamine, L-Glutamic acid γ-(ethylamide), Suntheanine

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100 MG
$163.00
500 MG
$634.00

$163.00

Available to ship onApril 29, 2025Details

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100 MG
$163.00
500 MG
$634.00

About This Item

Empirical Formula (Hill Notation):
C7H14N2O3
CAS Number:
3081-61-6
Molecular Weight:
174.20
EC Number:
221-379-0
MDL number:
MFCD00059653
UNSPSC Code:
12352209
PubChem Substance ID:
329824989
NACRES:
NA.25

$163.00

Available to ship onApril 29, 2025Details

Request a Bulk Order

Product Name

L-Theanine, ≥98% (HPLC)

Quality Level

200

assay

≥98% (HPLC)

form

powder

color

off-white

mp

217-218 °C

application(s)

cell analysis

storage temp.

2-8°C

SMILES string

CCNC(=O)CC[C@H](N)C(O)=O

InChI

1S/C7H14N2O3/c1-2-9-6(10)4-3-5(8)7(11)12/h5H,2-4,8H2,1H3,(H,9,10)(H,11,12)/t5-/m0/s1

InChI key

DATAGRPVKZEWHA-YFKPBYRVSA-N

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General description

L-Theanine is an analog of glutamine and a component of green tea.

Application


  • Safety and Efficacy of AlphaWave L-Theanine Supplementation for 28 Days in Healthy Adults with Moderate Stress: A Randomized, Double-Blind, Placebo-Controlled Trial.: This clinical trial demonstrates that L-theanine supplementation effectively reduces stress and improves cognitive function without adverse effects (Moulin et al., 2024). (Moulin et al., 2024).

  • Inhibitory Role of L-theanine, a Structural Analogue of Glutamate, Against GluR5 Kainate Receptor and its Prospective Utility Against Excitotoxicity.: The study examines L-theanine′s potential in protecting against neurotoxicity by inhibiting specific glutamate receptors (Deb and Borah, 2024). (Deb and Borah, 2024).

  • L-theanine abates oxidative stress and mitochondrial dysfunction in myocardial ischemia-reperfusion injury by positively regulating the antioxidant response.: This research demonstrates the cardioprotective effects of L-theanine, highlighting its role in reducing oxidative stress and improving mitochondrial function during heart injuries (García-Niño et al., 2024). (García-Niño et al., 2024).

Biochem/physiol Actions

L-Theanine modulates the activity of several antitumor drugs and has been reported to stimulate self-renewal of human embryonic stem cells. L-Theanine binds to AMPA, Kainate, NMDA, and group I mGlu receptors.
Theanine is able to bind to AMPA, kainite, and NMDA glycine receptors in rat cortical neurons but with less affinity than glutamic acid. It has been studied as a glutamate transport inhibitor, preventing glutamate uptake by M5076 ovarian sarcoma-bearing mouse cells and increasing the effect of doxorubicin on tumor growth in M5076 mice.

Other Notes

Theanine is an amino acid analog of glutamine, found in green tea.

pictograms

Exclamation mark
GHS07

signalword

Warning

hcodes

H317

Hazard Classifications

Skin Sens. 1

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
0000430272
0000430270
0000430270
0000430272
0000393762

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Chen Qi et al.
Journal of AOAC International, 103(2), 428-432 (2019-09-20)
In order to make up for the efficacy of sensory assessment of green tea quality and taste, main flavor substances should be quantitatively characterized based on efficient extraction and frontier determination scheme. A new, relatively simple sample preparation and detection
Guoqi Zhu et al.
Neuropharmacology, 138, 331-340 (2018-06-27)
Synaptic refinement improves synaptic efficiency, which provides a possibility to improve memory in Alzheimer's disease (AD). In the current study, we aimed to investigate the role of L-theanine, a natural constituent in green tea, in hippocampal synaptic transmission and to
G V V Liyanaarachchi et al.
Food chemistry, 240, 196-203 (2017-09-28)
The study presents the validation results of the method carried out for analysis of free amino acids (FAAs) in rice using l-theanine as the internal standard (IS) with o-phthalaldehyde (OPA) reagent using high-performance liquid chromatography-fluorescence detection. The detection and quantification
Li Zeng et al.
Experimental gerontology, 131, 110823-110823 (2020-01-04)
Redox and inflammation imbalances are associated with increased levels of advanced glycation end products (AGEs), leading to the degeneration of body function. l-Theanine, derived from tea, reportedly inhibits AGE formation in vitro. We investigated the effects on AGE content, oxidative

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  1. How is shipping temperature determined? And how is it related to the product storage temperature?

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    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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