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Year Number of Results
2007 2
2008 5
2009 1
2010 2
2012 4
2014 4
2015 4
2016 3
2017 11
2018 3
2019 6
2020 5
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Acute effects of tea constituents L-theanine, caffeine, and epigallocatechin gallate on cognitive function and mood: a systematic review and meta-analysis.
Camfield DA, Stough C, Farrimond J, Scholey AB. Camfield DA, et al. Nutr Rev. 2014 Aug;72(8):507-22. doi: 10.1111/nure.12120. Epub 2014 Jun 19. Nutr Rev. 2014. PMID: 24946991 Review.
A systematic review and meta-analysis was conducted on 11 randomized placebo-controlled human studies of acute effects of tea constituents L-theanine and epigallocatechin gallate, administered alone or in combination with caffeine, on cognitive function and m …
A systematic review and meta-analysis was conducted on 11 randomized placebo-controlled human studies of acute effects of tea constituents …
Effects of L-theanine or caffeine intake on changes in blood pressure under physical and psychological stresses.
Yoto A, Motoki M, Murao S, Yokogoshi H. Yoto A, et al. J Physiol Anthropol. 2012 Oct 29;31(1):28. doi: 10.1186/1880-6805-31-28. J Physiol Anthropol. 2012. PMID: 23107346 Free PMC article. Clinical Trial.
Both L-theanine and caffeine, which green tea contains, have been highlighted for their beneficial effects on cognition and mood. ...Fourteen participants each underwent three separate trials, in which they orally took either L-theanine + placeb …
Both L-theanine and caffeine, which green tea contains, have been highlighted for their beneficial effects on cognition …
The combination of L-theanine and caffeine improves cognitive performance and increases subjective alertness.
Giesbrecht T, Rycroft JA, Rowson MJ, De Bruin EA. Giesbrecht T, et al. Nutr Neurosci. 2010 Dec;13(6):283-90. doi: 10.1179/147683010X12611460764840. Nutr Neurosci. 2010. PMID: 21040626 Clinical Trial.
The non-proteinic amino acid L-theanine and caffeine, a methylxanthine derivative, are naturally occurring ingredients in tea. ...The present results suggest that 97 mg of L-theanine in combination with 40 mg of caffeine helps to focus at …
The non-proteinic amino acid L-theanine and caffeine, a methylxanthine derivative, are naturally occurring ingredients …
l-Theanine and caffeine improve target-specific attention to visual stimuli by decreasing mind wandering: a human functional magnetic resonance imaging study.
Kahathuduwa CN, Dhanasekara CS, Chin SH, Davis T, Weerasinghe VS, Dassanayake TL, Binks M. Kahathuduwa CN, et al. Nutr Res. 2018 Jan;49:67-78. doi: 10.1016/j.nutres.2017.11.002. Epub 2017 Nov 16. Nutr Res. 2018. PMID: 29420994 Clinical Trial.
Oral intake of l-theanine and caffeine supplements is known to be associated with faster stimulus discrimination, possibly via improving attention to stimuli. ...Factorial analysis suggested that l-theanine and caffeine seem to have a syn …
Oral intake of l-theanine and caffeine supplements is known to be associated with faster stimulus discrimination, possi …
The effects of L-theanine, caffeine and their combination on cognition and mood.
Haskell CF, Kennedy DO, Milne AL, Wesnes KA, Scholey AB. Haskell CF, et al. Biol Psychol. 2008 Feb;77(2):113-22. doi: 10.1016/j.biopsycho.2007.09.008. Epub 2007 Sep 26. Biol Psychol. 2008. PMID: 18006208 Clinical Trial.
L-Theanine is an amino acid found naturally in tea. Despite the common consumption of L-theanine, predominantly in combination with caffeine in the form of tea, only one study to date has examined the cognitive effects of this substance alone, a
L-Theanine is an amino acid found naturally in tea. Despite the common consumption of L-theanine, predominantly
A double-blind, placebo-controlled study evaluating the effects of caffeine and L-theanine both alone and in combination on cerebral blood flow, cognition and mood.
Dodd FL, Kennedy DO, Riby LM, Haskell-Ramsay CF. Dodd FL, et al. Psychopharmacology (Berl). 2015 Jul;232(14):2563-76. doi: 10.1007/s00213-015-3895-0. Epub 2015 Mar 13. Psychopharmacology (Berl). 2015. PMID: 25761837 Free PMC article. Clinical Trial.
METHODS: Twelve habitual consumers and 12 non-habitual consumers of caffeine each received 75 mg caffeine, 50 mg L-theanine, 75 mg caffeine plus 50 mg L-theanine, and placebo in a counterbalanced order across four separate visits. …
METHODS: Twelve habitual consumers and 12 non-habitual consumers of caffeine each received 75 mg caffeine, 50 mg L-t
L-theanine, unique amino acid of tea, and its metabolism, health effects, and safety.
Türközü D, Şanlier N. Türközü D, et al. Crit Rev Food Sci Nutr. 2017 May 24;57(8):1681-1687. doi: 10.1080/10408398.2015.1016141. Crit Rev Food Sci Nutr. 2017. PMID: 26192072 Review.
Although the catechins and caffeine are the primary bioactive components that are related with the health effects of the tea, the health effects of theanine amino acid, which is a nonproteinic amino acid special to tea, has become prominent in recent years. ...The r …
Although the catechins and caffeine are the primary bioactive components that are related with the health effects of the tea, the hea …
Acute effects of theanine, caffeine and theanine-caffeine combination on attention.
Kahathuduwa CN, Dassanayake TL, Amarakoon AMT, Weerasinghe VS. Kahathuduwa CN, et al. Nutr Neurosci. 2017 Jul;20(6):369-377. doi: 10.1080/1028415X.2016.1144845. Epub 2016 Feb 12. Nutr Neurosci. 2017. PMID: 26869148 Clinical Trial.
OBJECTIVE: l-theanine is a constituent of tea which is claimed to enhance cognitive functions. We aimed to determine whether theanine and theanine-caffeine combination have acute positive effects on cognitive and neurophysiological measures of a …
OBJECTIVE: l-theanine is a constituent of tea which is claimed to enhance cognitive functions. We aimed to determine whether …
GABA and l-theanine mixture decreases sleep latency and improves NREM sleep.
Kim S, Jo K, Hong KB, Han SH, Suh HJ. Kim S, et al. Pharm Biol. 2019 Dec;57(1):65-73. doi: 10.1080/13880209.2018.1557698. Pharm Biol. 2019. PMID: 30707852 Free PMC article.
The use of GABA/l-theanine mixture rather than GABA or l-theanine alone restored to normal levels sleep time and quality in the arousal animal model. The administration of GABA/l-theanine led to increased expression of GABA and the glutam …
The use of GABA/l-theanine mixture rather than GABA or l-theanine alone restored to normal levels sleep time and …
Caffeine and theanine exert opposite effects on attention under emotional arousal.
Giles GE, Mahoney CR, Brunyé TT, Taylor HA, Kanarek RB. Giles GE, et al. Can J Physiol Pharmacol. 2017 Jan;95(1):93-100. doi: 10.1139/cjpp-2016-0498. Can J Physiol Pharmacol. 2017. PMID: 28044450 Clinical Trial.
Tea is perceived as more relaxing than coffee, even though both contain caffeine. L-theanine in tea may account for the difference. ...We evaluated whether caffeine and theanine influenced cognition under emotional arousal. Using a double-blind, …
Tea is perceived as more relaxing than coffee, even though both contain caffeine. L-theanine in tea may account for the …
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