evidence table

Tea L-Theanine Cognition Sleep Mood Meta-Analysis Evidence Table

Structured evidence table for Tea L-Theanine Cognition Sleep Mood Meta-Analysis, generated from 2 reusable source documents in the Migaku knowledge base.

topicclaimevidence levelcitationsource
Tea L-Theanine Cognition Sleep Mood Meta-AnalysisContext The bioactive compounds found in tea from Camellia sinensis, namely theanine, caffeine, and polyphenols, can potentially improve short-term and long-term health outcomes.1Payne ER (2025)Effects of Tea (Camellia sinensis) or its Bioactive Compounds l-Theanine or l-Theanine plus Caffeine on Cognition, Sleep, and Mood in Healthy Participants: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.
Tea L-Theanine Cognition Sleep Mood Meta-AnalysisConclusions This meta-analysis provides evidence that theanine plus caffeine, and theanine alone, could be beneficial for cognitive and mood outcomes.1Payne ER (2025)Effects of Tea (Camellia sinensis) or its Bioactive Compounds l-Theanine or l-Theanine plus Caffeine on Cognition, Sleep, and Mood in Healthy Participants: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.
Tea L-Theanine Cognition Sleep Mood Meta-AnalysisObjective The aim of this study was to assess the effects of tea, theanine alone, or theanine plus caffeine on cognition, mood, and sleep outcomes, using data from randomized controlled trials (RCTs) in healthy participants.1Payne ER (2025)Effects of Tea (Camellia sinensis) or its Bioactive Compounds l-Theanine or l-Theanine plus Caffeine on Cognition, Sleep, and Mood in Healthy Participants: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.
Tea L-Theanine Cognition Sleep Mood Meta-AnalysisFailure to meet the recommended 7-9 hours of restful sleep per night is known to increase the risk of several health conditions, reason why regular and adequate sleep should be seen as a priority instead of an unnecessary commodity easily traded as required by the commitments of our busy lives.4Conti F (2026)Dietary Protocols to Promote and Improve Restful Sleep: A Narrative Review.
Tea L-Theanine Cognition Sleep Mood Meta-AnalysisWhile both the quantity and the quality of sleep can be largely improved with relatively straightforward practices dictated by good sleep hygiene, emerging research suggests that dietary and supplementation protocols focused on certain foods, nutrients, and biochemical compounds with sleep-promoting properties can act as subsidiary sleep aids in complementing these behavioral changes.4Conti F (2026)Dietary Protocols to Promote and Improve Restful Sleep: A Narrative Review.
Tea L-Theanine Cognition Sleep Mood Meta-AnalysisThe scope of this narrative review is to summarize the available evidence on the potential benefits of selected nutraceuticals in the context of circadian rhythm and sleep disturbances, namely melatonin, magnesium, omega-3 fatty acids, tart cherry juice, kiwifruit, apigenin, valerian root, L-theanine, glycine, ashwagandha, myoinositol, Rhodiola rosea, and phosphatidylserine.4Conti F (2026)Dietary Protocols to Promote and Improve Restful Sleep: A Narrative Review.
Tea L-Theanine Cognition Sleep Mood Meta-AnalysisHumans spend approximately one third of their life asleep but, as counterintuitive as it may sound, sleep is far from being a quiet state of inactivity.4Conti F (2026)Dietary Protocols to Promote and Improve Restful Sleep: A Narrative Review.
topicTea L-Theanine Cognition Sleep Mood Meta-Analysis
claimContext The bioactive compounds found in tea from Camellia sinensis, namely theanine, caffeine, and polyphenols, can potentially improve short-term and long-term health outcomes.
evidence level1
citationPayne ER (2025)
sourceEffects of Tea (Camellia sinensis) or its Bioactive Compounds l-Theanine or l-Theanine plus Caffeine on Cognition, Sleep, and Mood in Healthy Participants: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.
topicTea L-Theanine Cognition Sleep Mood Meta-Analysis
claimConclusions This meta-analysis provides evidence that theanine plus caffeine, and theanine alone, could be beneficial for cognitive and mood outcomes.
evidence level1
citationPayne ER (2025)
sourceEffects of Tea (Camellia sinensis) or its Bioactive Compounds l-Theanine or l-Theanine plus Caffeine on Cognition, Sleep, and Mood in Healthy Participants: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.
topicTea L-Theanine Cognition Sleep Mood Meta-Analysis
claimObjective The aim of this study was to assess the effects of tea, theanine alone, or theanine plus caffeine on cognition, mood, and sleep outcomes, using data from randomized controlled trials (RCTs) in healthy participants.
evidence level1
citationPayne ER (2025)
sourceEffects of Tea (Camellia sinensis) or its Bioactive Compounds l-Theanine or l-Theanine plus Caffeine on Cognition, Sleep, and Mood in Healthy Participants: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.
topicTea L-Theanine Cognition Sleep Mood Meta-Analysis
claimFailure to meet the recommended 7-9 hours of restful sleep per night is known to increase the risk of several health conditions, reason why regular and adequate sleep should be seen as a priority instead of an unnecessary commodity easily traded as required by the commitments of our busy lives.
evidence level4
citationConti F (2026)
sourceDietary Protocols to Promote and Improve Restful Sleep: A Narrative Review.
topicTea L-Theanine Cognition Sleep Mood Meta-Analysis
claimWhile both the quantity and the quality of sleep can be largely improved with relatively straightforward practices dictated by good sleep hygiene, emerging research suggests that dietary and supplementation protocols focused on certain foods, nutrients, and biochemical compounds with sleep-promoting properties can act as subsidiary sleep aids in complementing these behavioral changes.
evidence level4
citationConti F (2026)
sourceDietary Protocols to Promote and Improve Restful Sleep: A Narrative Review.
topicTea L-Theanine Cognition Sleep Mood Meta-Analysis
claimThe scope of this narrative review is to summarize the available evidence on the potential benefits of selected nutraceuticals in the context of circadian rhythm and sleep disturbances, namely melatonin, magnesium, omega-3 fatty acids, tart cherry juice, kiwifruit, apigenin, valerian root, L-theanine, glycine, ashwagandha, myoinositol, Rhodiola rosea, and phosphatidylserine.
evidence level4
citationConti F (2026)
sourceDietary Protocols to Promote and Improve Restful Sleep: A Narrative Review.
topicTea L-Theanine Cognition Sleep Mood Meta-Analysis
claimHumans spend approximately one third of their life asleep but, as counterintuitive as it may sound, sleep is far from being a quiet state of inactivity.
evidence level4
citationConti F (2026)
sourceDietary Protocols to Promote and Improve Restful Sleep: A Narrative Review.

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Source documents

  1. Effects of Tea (Camellia sinensis) or its Bioactive Compounds l-Theanine or l-Theanine plus Caffeine on Cognition, Sleep, and Mood in Healthy Participants: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.
  2. Dietary Protocols to Promote and Improve Restful Sleep: A Narrative Review.