Theanine (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Theanine" in English language version.

refsWebsite

Global rank English rank

18doi.org

2^nd place

18nih.gov

4^th place

4semanticscholar.org

11^th place

8^th place

2web.archive.org

1^st place

2ippodo-tea.co.jp

low place

2harvard.edu

18^th place

17^th place

2bund.de

2,092^nd place

5,505^th place

1chemspider.com

8,573^rd place

low place

1drugs.com

399^th place

333^rd place

1fda.gov

447^th place

338^th place

1nii.ac.jp

304^th place

1,952^nd place

1umontpellier.fr

low place

1books.google.com

3^rd place

1delo.si

8,982^nd place

9,890^th place

1aston.ac.uk

low place

aston.ac.uk

publications.aston.ac.uk

Williams JL, Everett JM, D'Cunha NM, et al. (March 2020). "The Effects of Green Tea Amino Acid L-Theanine Consumption on the Ability to Manage Stress and Anxiety Levels: a Systematic Review" (PDF). Plant Foods for Human Nutrition. 75 (1): 12–23. doi:10.1007/s11130-019-00771-5. PMID 31758301. S2CID 208213702.

books.google.com

Kanarek RB, Lieberman HR (2011). Diet, Brain, Behavior: Practical Implications. CRC Press. pp. 239–. ISBN 978-1-4398-2156-5.

bund.de

bfr.bund.de

"Getränke mit isoliertem L-Theanin" [Drinks with isolated L-Theanine] (PDF). Bundesinstitut für Riskobewertung (BfR) [Federal Institute for Risk Assessment (BfR)] (in German). June 2001.
"Getränke mit isoliertem L-Theanin" [Beverages with isolated L-theanine] (PDF) (in German). Bundesinstitut für Risikobewertung. August 2003.

chemspider.com

"D-theanine | C7H14N2O3". ChemSpider.com. Retrieved 2015-05-21.

delo.si

"Inšpekcija prepovedala prodajo pijače Prime zaradi nedovoljene sestavine" [Inspection Bans Sale of Prime Because of an Unauthorised Ingredient]. Delo.si (in Slovenian). 13 November 2023.

doi.org

Scheid L, Ellinger S, Alteheld B, Herholz H, Ellinger J, Henn T, et al. (December 2012). "Kinetics of L-theanine uptake and metabolism in healthy participants are comparable after ingestion of L-theanine via capsules and green tea". The Journal of Nutrition. 142 (12): 2091–2096. doi:10.3945/jn.112.166371. PMID 23096008.
Schuster J, Mitchell ES (March 2019). "More than just caffeine: psychopharmacology of methylxanthine interactions with plant-derived phytochemicals". Progress in Neuro-Psychopharmacology & Biological Psychiatry. 89: 263–274. doi:10.1016/j.pnpbp.2018.09.005. PMID 30213684. S2CID 52274913.
EFSA Panel on Dietetic Products, Nutrition and Allergies, European Food Safety Authority (2011). "Scientific Opinion on the substantiation of health claims related to L-theanine from Camellia sinensis (L.) Kuntze (Tea) and improvement of cognitive function (ID 1104, 1222, 1600, 1601, 1707, 1935, 2004, 2005), alleviation of psychological stress (ID 1598, 1601), maintenance of normal sleep (ID 1222, 1737, 2004) and reduction of menstrual discomfort (ID 1599) pursuant to Article 13(1) of Regulation (EC) No 1924/2006". EFSA Journal. 9 (6): 2238. doi:10.2903/j.efsa.2011.2238.
Vuong QV, Bowyer MC, Roach PD (August 2011). "L-Theanine: properties, synthesis and isolation from tea". Journal of the Science of Food and Agriculture. 91 (11): 1931–1939. Bibcode:2011JSFA...91.1931V. doi:10.1002/jsfa.4373. PMID 21735448.
Desai MJ, Armstrong DW (2004). "Analysis of derivatized and underivatized theanine enantiomers by high-performance liquid chromatography/atmospheric pressure ionization-mass spectrometry". Rapid Communications in Mass Spectrometry. 18 (3): 251–256. Bibcode:2004RCMS...18..251D. doi:10.1002/rcm.1319. PMID 14755608.
Sakato Y (1949). "The chemical constituents of tea: III. A new amide theanine". Nippon Nogeikagaku Kaishi. 23: 262–267. doi:10.1271/nogeikagaku1924.23.262.
Finger A, Kuhr S, Engelhardt UH (October 1992). "Chromatography of tea constituents". Journal of Chromatography. 624 (1–2): 293–315. doi:10.1016/0021-9673(92)85685-M. PMID 1494009.
Casimir J, Jadot J, Renard M (April 1960). "[Separation and characterization of N-ethyl-gamma-glutamine from Xerocomus badius]" [Separation and characterization of N-ethyl-γ-glutamine from Xerocomus badius]. Biochimica et Biophysica Acta (in French). 39 (3): 462–468. doi:10.1016/0006-3002(60)90199-2. PMID 13808157.
Chen X, Ye K, Xu Y, Zhao Y, Zhao D (November 2022). "Effect of Shading on the Morphological, Physiological, and Biochemical Characteristics as Well as the Transcriptome of Matcha Green Tea". International Journal of Molecular Sciences. 23 (22): 14169. doi:10.3390/ijms232214169. PMC 9696345. PMID 36430647.
Kurihara S, Shibakusa T, Tanaka KA (November 2013). "Cystine and theanine: amino acids as oral immunomodulative nutrients". SpringerPlus. 2: 635. doi:10.1186/2193-1801-2-635. PMC 3851524. PMID 24312747.
Nathan PJ, Lu K, Gray M, Oliver C (2006). "The neuropharmacology of L-theanine(N-ethyl-L-glutamine): a possible neuroprotective and cognitive enhancing agent". Journal of Herbal Pharmacotherapy. 6 (2): 21–30. doi:10.1300/J157v06n02_02. PMID 17182482.
Kakuda T (August 2011). "Neuroprotective effects of theanine and its preventive effects on cognitive dysfunction". Pharmacological Research. 64 (2): 162–168. doi:10.1016/j.phrs.2011.03.010. PMID 21477654.
Sebih F, Rousset M, Bellahouel S, Rolland M, de Jesus Ferreira MC, Guiramand J, et al. (August 2017). "Characterization of l-Theanine Excitatory Actions on Hippocampal Neurons: Toward the Generation of Novel N-Methyl-d-aspartate Receptor Modulators Based on Its Backbone" (PDF). ACS Chemical Neuroscience. 8 (8): 1724–1734. doi:10.1021/acschemneuro.7b00036. PMID 28511005. S2CID 3533449.
Nagasawa K, Aoki H, Yasuda E, Nagai K, Shimohama S, Fujimoto S (July 2004). "Possible involvement of group I mGluRs in neuroprotective effect of theanine". Biochemical and Biophysical Research Communications. 320 (1): 116–122. doi:10.1016/j.bbrc.2004.05.143. PMID 15207710.
Sugiyama T, Sadzuka Y, Tanaka K, Sonobe T (April 2001). "Inhibition of glutamate transporter by theanine enhances the therapeutic efficacy of doxorubicin". Toxicology Letters. 121 (2): 89–96. doi:10.1016/s0378-4274(01)00317-4. PMID 11325559.
Narukawa M, Toda Y, Nakagita T, Hayashi Y, Misaka T (June 2014). "L-Theanine elicits umami taste via the T1R1 + T1R3 umami taste receptor". Amino Acids. 46 (6): 1583–1587. doi:10.1007/s00726-014-1713-3. PMID 24633359. S2CID 17380461.
Mason R (April 2001). "200 mg of Zen: L-theanine boosts alpha waves, promotes alert relaxation". Alternative & Complementary Therapies. 7 (2): 91–95. doi:10.1089/10762800151125092.
Williams JL, Everett JM, D'Cunha NM, et al. (March 2020). "The Effects of Green Tea Amino Acid L-Theanine Consumption on the Ability to Manage Stress and Anxiety Levels: a Systematic Review" (PDF). Plant Foods for Human Nutrition. 75 (1): 12–23. doi:10.1007/s11130-019-00771-5. PMID 31758301. S2CID 208213702.

drugs.com

"L-Theanine". Drugs.com. 20 February 2023. Retrieved 16 May 2023.

fda.gov

cfsanappsexternal.fda.gov

"GRAS notice for L-theanine". US Food and Drug Administration. 5 February 2007. Retrieved 1 May 2023.

harvard.edu

ui.adsabs.harvard.edu

Vuong QV, Bowyer MC, Roach PD (August 2011). "L-Theanine: properties, synthesis and isolation from tea". Journal of the Science of Food and Agriculture. 91 (11): 1931–1939. Bibcode:2011JSFA...91.1931V. doi:10.1002/jsfa.4373. PMID 21735448.
Desai MJ, Armstrong DW (2004). "Analysis of derivatized and underivatized theanine enantiomers by high-performance liquid chromatography/atmospheric pressure ionization-mass spectrometry". Rapid Communications in Mass Spectrometry. 18 (3): 251–256. Bibcode:2004RCMS...18..251D. doi:10.1002/rcm.1319. PMID 14755608.

ippodo-tea.co.jp

"Components of Gyokuro｜ IPPODO". Ippodo-tea.co.jp. Archived from the original on 2015-12-23. Retrieved 2015-05-07.
"How Gyokuro is Processed ｜ IPPODO". Ippodo-tea.co.jp. Archived from the original on 2018-04-25. Retrieved 2015-05-07.

nih.gov

pubmed.ncbi.nlm.nih.gov

Scheid L, Ellinger S, Alteheld B, Herholz H, Ellinger J, Henn T, et al. (December 2012). "Kinetics of L-theanine uptake and metabolism in healthy participants are comparable after ingestion of L-theanine via capsules and green tea". The Journal of Nutrition. 142 (12): 2091–2096. doi:10.3945/jn.112.166371. PMID 23096008.
Schuster J, Mitchell ES (March 2019). "More than just caffeine: psychopharmacology of methylxanthine interactions with plant-derived phytochemicals". Progress in Neuro-Psychopharmacology & Biological Psychiatry. 89: 263–274. doi:10.1016/j.pnpbp.2018.09.005. PMID 30213684. S2CID 52274913.
Vuong QV, Bowyer MC, Roach PD (August 2011). "L-Theanine: properties, synthesis and isolation from tea". Journal of the Science of Food and Agriculture. 91 (11): 1931–1939. Bibcode:2011JSFA...91.1931V. doi:10.1002/jsfa.4373. PMID 21735448.
Desai MJ, Armstrong DW (2004). "Analysis of derivatized and underivatized theanine enantiomers by high-performance liquid chromatography/atmospheric pressure ionization-mass spectrometry". Rapid Communications in Mass Spectrometry. 18 (3): 251–256. Bibcode:2004RCMS...18..251D. doi:10.1002/rcm.1319. PMID 14755608.
Finger A, Kuhr S, Engelhardt UH (October 1992). "Chromatography of tea constituents". Journal of Chromatography. 624 (1–2): 293–315. doi:10.1016/0021-9673(92)85685-M. PMID 1494009.
Casimir J, Jadot J, Renard M (April 1960). "[Separation and characterization of N-ethyl-gamma-glutamine from Xerocomus badius]" [Separation and characterization of N-ethyl-γ-glutamine from Xerocomus badius]. Biochimica et Biophysica Acta (in French). 39 (3): 462–468. doi:10.1016/0006-3002(60)90199-2. PMID 13808157.
Chen X, Ye K, Xu Y, Zhao Y, Zhao D (November 2022). "Effect of Shading on the Morphological, Physiological, and Biochemical Characteristics as Well as the Transcriptome of Matcha Green Tea". International Journal of Molecular Sciences. 23 (22): 14169. doi:10.3390/ijms232214169. PMC 9696345. PMID 36430647.
Kurihara S, Shibakusa T, Tanaka KA (November 2013). "Cystine and theanine: amino acids as oral immunomodulative nutrients". SpringerPlus. 2: 635. doi:10.1186/2193-1801-2-635. PMC 3851524. PMID 24312747.
Nathan PJ, Lu K, Gray M, Oliver C (2006). "The neuropharmacology of L-theanine(N-ethyl-L-glutamine): a possible neuroprotective and cognitive enhancing agent". Journal of Herbal Pharmacotherapy. 6 (2): 21–30. doi:10.1300/J157v06n02_02. PMID 17182482.
Kakuda T (August 2011). "Neuroprotective effects of theanine and its preventive effects on cognitive dysfunction". Pharmacological Research. 64 (2): 162–168. doi:10.1016/j.phrs.2011.03.010. PMID 21477654.
Sebih F, Rousset M, Bellahouel S, Rolland M, de Jesus Ferreira MC, Guiramand J, et al. (August 2017). "Characterization of l-Theanine Excitatory Actions on Hippocampal Neurons: Toward the Generation of Novel N-Methyl-d-aspartate Receptor Modulators Based on Its Backbone" (PDF). ACS Chemical Neuroscience. 8 (8): 1724–1734. doi:10.1021/acschemneuro.7b00036. PMID 28511005. S2CID 3533449.
Nagasawa K, Aoki H, Yasuda E, Nagai K, Shimohama S, Fujimoto S (July 2004). "Possible involvement of group I mGluRs in neuroprotective effect of theanine". Biochemical and Biophysical Research Communications. 320 (1): 116–122. doi:10.1016/j.bbrc.2004.05.143. PMID 15207710.
Sugiyama T, Sadzuka Y, Tanaka K, Sonobe T (April 2001). "Inhibition of glutamate transporter by theanine enhances the therapeutic efficacy of doxorubicin". Toxicology Letters. 121 (2): 89–96. doi:10.1016/s0378-4274(01)00317-4. PMID 11325559.
Narukawa M, Toda Y, Nakagita T, Hayashi Y, Misaka T (June 2014). "L-Theanine elicits umami taste via the T1R1 + T1R3 umami taste receptor". Amino Acids. 46 (6): 1583–1587. doi:10.1007/s00726-014-1713-3. PMID 24633359. S2CID 17380461.
Williams JL, Everett JM, D'Cunha NM, et al. (March 2020). "The Effects of Green Tea Amino Acid L-Theanine Consumption on the Ability to Manage Stress and Anxiety Levels: a Systematic Review" (PDF). Plant Foods for Human Nutrition. 75 (1): 12–23. doi:10.1007/s11130-019-00771-5. PMID 31758301. S2CID 208213702.

ncbi.nlm.nih.gov

Chen X, Ye K, Xu Y, Zhao Y, Zhao D (November 2022). "Effect of Shading on the Morphological, Physiological, and Biochemical Characteristics as Well as the Transcriptome of Matcha Green Tea". International Journal of Molecular Sciences. 23 (22): 14169. doi:10.3390/ijms232214169. PMC 9696345. PMID 36430647.
Kurihara S, Shibakusa T, Tanaka KA (November 2013). "Cystine and theanine: amino acids as oral immunomodulative nutrients". SpringerPlus. 2: 635. doi:10.1186/2193-1801-2-635. PMC 3851524. PMID 24312747.

pubchem.ncbi.nlm.nih.gov

"L-Theanine". PubChem, US National Library of Medicine. 13 May 2023. Retrieved 16 May 2023.

nii.ac.jp

cir.nii.ac.jp

Sakato Y (1949). "The chemical constituents of tea: III. A new amide theanine". Nippon Nogeikagaku Kaishi. 23: 262–267. doi:10.1271/nogeikagaku1924.23.262.

semanticscholar.org

api.semanticscholar.org

Schuster J, Mitchell ES (March 2019). "More than just caffeine: psychopharmacology of methylxanthine interactions with plant-derived phytochemicals". Progress in Neuro-Psychopharmacology & Biological Psychiatry. 89: 263–274. doi:10.1016/j.pnpbp.2018.09.005. PMID 30213684. S2CID 52274913.
Sebih F, Rousset M, Bellahouel S, Rolland M, de Jesus Ferreira MC, Guiramand J, et al. (August 2017). "Characterization of l-Theanine Excitatory Actions on Hippocampal Neurons: Toward the Generation of Novel N-Methyl-d-aspartate Receptor Modulators Based on Its Backbone" (PDF). ACS Chemical Neuroscience. 8 (8): 1724–1734. doi:10.1021/acschemneuro.7b00036. PMID 28511005. S2CID 3533449.
Narukawa M, Toda Y, Nakagita T, Hayashi Y, Misaka T (June 2014). "L-Theanine elicits umami taste via the T1R1 + T1R3 umami taste receptor". Amino Acids. 46 (6): 1583–1587. doi:10.1007/s00726-014-1713-3. PMID 24633359. S2CID 17380461.
Williams JL, Everett JM, D'Cunha NM, et al. (March 2020). "The Effects of Green Tea Amino Acid L-Theanine Consumption on the Ability to Manage Stress and Anxiety Levels: a Systematic Review" (PDF). Plant Foods for Human Nutrition. 75 (1): 12–23. doi:10.1007/s11130-019-00771-5. PMID 31758301. S2CID 208213702.

umontpellier.fr

hal.umontpellier.fr

Sebih F, Rousset M, Bellahouel S, Rolland M, de Jesus Ferreira MC, Guiramand J, et al. (August 2017). "Characterization of l-Theanine Excitatory Actions on Hippocampal Neurons: Toward the Generation of Novel N-Methyl-d-aspartate Receptor Modulators Based on Its Backbone" (PDF). ACS Chemical Neuroscience. 8 (8): 1724–1734. doi:10.1021/acschemneuro.7b00036. PMID 28511005. S2CID 3533449.

web.archive.org

"Components of Gyokuro｜ IPPODO". Ippodo-tea.co.jp. Archived from the original on 2015-12-23. Retrieved 2015-05-07.
"How Gyokuro is Processed ｜ IPPODO". Ippodo-tea.co.jp. Archived from the original on 2018-04-25. Retrieved 2015-05-07.