• Skip to primary navigation
  • Skip to main content
  • Skip to footer

LKT Labs

Biochemicals for Life Science Research

  • Products
    • New Products
    • Cancer Biology
    • Cardiovascular
    • Endocrine Signaling and Immunology
    • Metabolic and GI Pathology
    • Microbiology
    • Natural Products
    • Neuroscience
    • Peptides
    • Pharmaceutical Impurities and Derivatives
    • Stem Cell Modulators
  • Services
    • Custom Synthesis
    • Natural Product Isolation
    • Analytical Services
  • Int’l Distributors
  • Support
    • About LKT Labs
    • General Inquiry
    • Bulk Quote Request
    • Document Request
    • Technical Support
    • Catalog Request
    • Product Flyers
  • Contact Us
  • Cart
  • Login / Register
L-Theanine

L-Theanine

Product ID T2816
Cas No. 3081-61-6
Purity ≥98%
Product Unit SizeCostQuantityStock
1 g $61.80 In stock
5 g $211.90 In stock
25 g $670.20 In stock
Bulk Quote

Quicklinks

  • Description
  • Product Info
  • Shipping and Storage
  • Downloads
  • References
  • Description
  • Product Info
  • Shipping and Storage
  • Downloads
  • References
  • Custom Order

Description

L-Theanine is an amino acid that can be found in Camellia and Boletus; it is a glutamic acid analog. L-theanine exhibits neuroprotective, cognition enhancing, anxiolytic, and antipsychotic activities. L-Theanine is a weak agonist at AMPA and NMDA receptors, increasing brain DA, 5-HT, and GABA levels. This compound improves memory, cognition, mood, and attention in clinical settings. In animal models of cerebral ischemia, L-theanine inhibits apoptosis of hippocampal neurons, improving spatial memory.

Product Info

Cas No.

3081-61-6

Purity

≥98%

Formula

C7H14N2O3

Formula Wt.

174.19

Chemical Name

N-Ethyl-L-glutamine

IUPAC Name

(2S)-2-amino-5-(ethylamino)-5-oxopentanoic acid

Synonym

Theanine

Melting Point

210-215°C (dec)

Solubility

Soluble in water. Insoluble in alcohol.

Appearance

White Crystalline Powder

Shipping and Storage

Store Temp

Ambient

Ship Temp

Ambient

Downloads

MSDS

T2816 MSDS PDF

Info Sheet

T2816 Info Sheet PDF

References

Park SK, Jung IC, Lee WK, et al. A combination of green tea extract and l-theanine improves memory and attention in subjects with mild cognitive impairment: a double-blind placebo-controlled study. J Med Food. 2011 Apr;14(4):334-43. PMID: 21303262.

Ritsner MS, Miodownik C, Ratner Y, et al. L-theanine relieves positive, activation, and anxiety symptoms in patients with schizophrenia and schizoaffective disorder: an 8-week, randomized, double-blind, placebo-controlled, 2-center study. J Clin Psychiatry. 2011 Jan;72(1):34-42. PMID: 21208586.

Haskell CF, Kennedy DO, Milne AL, et al. The effects of L-theanine, caffeine and their combination on cognition and mood. Biol Psychol. 2008 Feb;77(2):113-22. PMID: 18006208.

Egashira N, Ishigami N, Pu F, et al. Theanine prevents memory impairment induced by repeated cerebral ischemia in rats. Phytother Res. 2008 Jan;22(1):65-8. PMID: 17705146.

Nathan PJ, Lu K, Gray M, et al. The neuropharmacology of L-theanine(N-ethyl-L-glutamine): a possible neuroprotective and cognitive enhancing agent. J Herb Pharmacother. 2006;6(2):21-30. PMID: 17182482.

Custom Order

  • Size of single unit expressed as number (e.g. '500' in the case of 500 mg)
  • Total quantity of unit size desired (e.g. '10' in the case of 10 x 500 mg). If only one unit is desired, you may leave this blank.
  • This field is for validation purposes and should be left unchanged.

Related Products

  • A7868

    Atropine

    Tropane alkaloid found in plants in the Solanac...

    ≥98%
  • B1874

    Bestatin Hydrochloride

    Dipeptide; aminopeptidase (N/CD13) inhibitor.

    ≥98%
  • C1650

    β-Cembrenediol Methyl Ether

    Diterpene found in tobacco plants and cigarette...

    ≥98%
  • I0481

    Ibuprofen

    NSAID; COX-1/2 inhibitor.

    ≥98%
  • B8070

    2-tert-Butyl-4-Hydroxyanisole

    BHA derivative, antioxidative food and cosmetic...

    ≥99% single isomer
  • P7058

    Protocatechuic Aldehyde

    Polyphenol found in various plants and foods.

    ≥98%
  • T162051

    Tebipenem

    Broad-spectrum antibiotic

    ≥99%
  • I7359

    1-Isothiocyanato-8-(methylsulfenyl)-octane

    ITC, erucin analog.

    ≥98%
  • T0116

    2″,3″-Dihydrocephalomannine

    Cephalomannine derivative found in Taxus; poten...

    ≥96%
  • E6233

    (−)-Epigallocatechin

    Flavanol originally found in Camilla (green tea...

    ≥98%
  • N176498

    Nemorosone

    Found in the propolis of honey bees.

    ≥99%
  • A6932

    Aristolochic Acid A

    Found in Aristolochia and Radix; PLA2 inhibitor...

    ≥95%
  • T0299

    Tazobactam Sodium

    β-lactamase inhibitor.

    ≥98%
  • T7676

    HT-2 Toxin

    Trichothecene mycotoxin produced by Fusarium.

    ≥98%, TLC, HPLC
  • C1649

    β-Cembrenediol

    Diterpene found in Anisomeles.

    ≥99%
  • T1673

    Terlipressin Acetate

    Synthetic peptide, vasopressin analog; AVPR1 ag...

    ≥95%
  • A600002

    AP-26113

    Pan inhibitor of ALK.

    ≥98%
  • N3450

    Nimesulide

    NSAID; COX-2 inhibitor.

    ≥98%
  • E7324

    Ethisterone

    Synthetic steroid hormone, contraceptive; PR ag...

    ≥98%
  • L0360

    Lapatinib Ditosylate Monohydrate

    EGFR inhibitor.

    ≥99%

Footer

  • Contact Us
  • About Us
  • Site Map
  • Terms and Conditions
LKT Laboratories, Inc.
545 Phalen Blvd.
St. Paul MN, 55130

Ph: (888)-558-5227
Fax: (888)-558-7329

©2025 LKT Laboratories, All Rights Reserved - Products for research use only