Meta AnalysisID 152
茶（茶树）或其生物活性成分L-茶氨酸或L-茶氨酸联合咖啡因对健康人群认知、睡眠和情绪的影响：一项系统评价
CRD42022351601
What is the effect of tea derived from Camellia sinensis, L-theanine, or L-theanine plus caffeine, but not solely caffeine, compared to a control, on cognition, sleep, and mood in apparently healthy human participants pa
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Record Fields
Scalar fields from the final meta_analysis record.
- Meta Analysis Id
- 152
- Evidence Id
- 8710
- Core Evidence Id
- 8710
- Source Meta Analysis Id
- 138
- Herb2 Meta Analysis Id
- HBMA000138
- Crd Id
- CRD42022351601
- Title
- The effects of tea (Camellia sinensis) or its bioactive compounds L-theanine or L-theanine plus caffeine on cognition, sleep, and mood in apparently healthy subjects: a systematic review
- Review Question
- What is the effect of tea derived from Camellia sinensis, L-theanine, or L-theanine plus caffeine, but not solely caffeine, compared to a control, on cognition, sleep, and mood in apparently healthy human participants participating in randomized controlled trials?
- Study Type Included
- Only randomised controlled trials will be included. Systematic reviews, meta-analyses, and abstracts, exposure, in vitro, in silico, observational, animal, and case studies will be excluded. Within-subject trials/crossover trials and parallel group trials will be included.
- Condition Being Studied
- Our systematic review will focus on human cognitive function, sleep, and mood.
- Participant
- We will include data obtained in apparently healthy participants of any age. We will include studies of participants with ADHD or autism. We will exclude studies of participants with severe clinical symptoms of depression, schizophrenia, mental health disorders, Alzheimer’s, dementia, or anything that requires institutionalisation or intensive pharmacological intervention that would be expected to interfere with the primary outcome(s). We will exclude studies in which the participants did not attain a normal score on a neurological questionnaire.
- Animal
- Human Disease Modelled
- Intervention
- Studies using interventions that include tea, green tea, black tea, theanine, L-theanine, γ-glutamylethylamide, g-glutamylethylamide, Camellia sinensis or Camelia sinensis will be considered. Any intervention in which the effects of tea cannot be disentangled from the control/comparator will not be considered. Interventions that include common tea additives such as milk and sugar will be considered. Interventions of any dose, form, or duration will be considered. Interventions that only contain caffeine, polyphenols, flavonoids, or catechins, or any combination, will be excluded.
- Comparator Control
- Studies will only be considered if they include a control and/or placebo treatment. Multiple controls will be considered, for example, water (temperature-matched, tap, mineral, caffeine-matched), coffee, or caffeine.
- Main Outcome
- The main outcomes will be cognition, sleep, and/or mood.
- Outcome Measure
- Additional Outcome
- Study Method
- Meta-analysis, Systematic review
- Keyword
- Caffeine; Camellia sinensis; Cognition; Healthy Volunteers; Humans; Sleep; Tea; theanine
- Contact
- Edward Payne [email protected]
- Organisational Affiliation
- University of Aberdeen ekaterra https://www.abdn.ac.uk/
- Funding Source
- ekaterra Research & Development UK Limited
- Other Selection Criteria
- Final Publication
- Same Topic Review
- Published Protocol
- Review Type
- Language
- English
- Country
- Scotland
- Review Stage
- Review Ongoing
- First Submission Date
- 2022-08-05
- Registration Date
- 2022-08-17
- Anticipated Start Date
- 2022-08-05
- Anticipated Completion Date
- 2022-12-31
- Title Cn
- 茶（茶树）或其生物活性成分L-茶氨酸或L-茶氨酸联合咖啡因对健康人群认知、睡眠和情绪的影响：一项系统评价
- Title En
- The effects of tea (Camellia sinensis) or its bioactive compounds L-theanine or L-theanine plus caffeine on cognition, sleep, and mood in apparently healthy subjects: a systematic review
- Bilingual Status
- complete