Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.
- 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.
Payne ER; Aceves-Martins M; Dubost J; Greyling A; de Roos B · Nutrition reviews · 2025
Meta-analysis50 studies pooledflagCognitive Support forscienceTheanine
- Promising, but Not Completely Conclusive-The Effect of l-Theanine on Cognitive Performance Based on the Systematic Review and Meta-Analysis of Randomized Placebo-Controlled Clinical Trials.
Mátyus RO; Szikora Z; Bodó D; Vargáné Szabó B; Csupor É; Csupor D; Tóth B · Journal of clinical medicine · 2025
Meta-analysis148 participants5 studies pooledflagCognitive Support forscienceTheanine
- 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 · Psychopharmacology · 2016
Randomized trial24 participantsflagCognitive Support forscienceTheanine
- Green tea and coffee intake and risk of cognitive decline in older adults: the National Institute for Longevity Sciences, Longitudinal Study of Aging.
Shirai Y; Kuriki K; Otsuka R; Kato Y; Nishita Y; Tange C; Tomida M; Imai T; Ando F; Shimokata H · Public health nutrition · 2021
Cohort study1,305 participantsflagAnti-Aging forscienceGreen Tea
- Associations of green tea, coffee, and soft drink consumption with longitudinal changes in leukocyte telomere length.
Sohn I; Shin C; Baik I · Scientific reports · 2023
Cohort study1,952 participantsflagAnti-Aging forscienceGreen Tea
- Can teatime increase one's lifetime?
Nakachi K; Eguchi H; Imai K · Ageing research reviews · 2003
Cohort studyflagAnti-Aging forscienceGreen Tea
- Influences of tea consumption on self-rated health and life satisfaction among older adults: Evidence from the CLHLS.
Zou M; Sun C; Yang M; Li C; Wang S; Zheng D; Wang J; Yu L; Sun L; Wang Y; Chen H; Zeng Y · PsyCh journal · 2025
Cohort study78,345 participantsflagAnti-Aging forscienceGreen Tea
- Double-blinded, placebo-controlled trial of green tea extracts in the clinical and histologic appearance of photoaging skin.
Chiu AE; Chan JL; Kern DG; Kohler S; Rehmus WE; Kimball AB · Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.] · 2005
Randomized trial40 participantsflagAnti-Aging forscienceGreen Tea
- The effects of green tea on acne vulgaris: A systematic review and meta-analysis of randomized clinical trials.
Kim S; Park TH; Kim WI; Park S; Kim JH; Cho MK · Phytotherapy research : PTR · 2021
Meta-analysis247 participants5 studies pooledflagAnti-Inflammatory Support forscienceGreen Tea
- Green Tea Catechin Association with Ultraviolet Radiation-Induced Erythema: A Systematic Review and Meta-Analysis.
Kapoor MP; Sugita M; Fukuzawa Y; Timm D; Ozeki M; Okubo T · Molecules (Basel, Switzerland) · 2021
Meta-analysis100 participants6 studies pooledflagAnti-Inflammatory Support flagSkin Health forscienceGreen Tea
- Efficacy of (-)-epigallocatechin gallate delivered by a new-type scaler tip during scaling and root planing on chronic periodontitis: a split-mouth, randomized clinical trial.
Wang Y; Zeng J; Yuan Q; Luan Q · BMC oral health · 2021
Randomized trial20 participantsflagAnti-Inflammatory Support forscienceGreen Tea
- Camellia Sinensis Mouthwashes in Oral Care: a Systematic Review.
Tafazoli A; Tafazoli Moghadam E · Journal of dentistry (Shiraz, Iran) · 2020
Systematic review69 studies pooledflagAnti-Inflammatory Support forscienceGreen Tea
- Skin photoprotection by green tea: antioxidant and immunomodulatory effects.
Katiyar SK · Current drug targets. Immune, endocrine and metabolic disorders · 2004
Narrative reviewflagAnti-Inflammatory Support forscienceGreen Tea
- Safety and efficacy of cognitive training plus epigallocatechin-3-gallate in young adults with Down's syndrome (TESDAD): a double-blind, randomised, placebo-controlled, phase 2 trial.
de la Torre R; de Sola S; Hernandez G; Farré M; Pujol J; Rodriguez J; Espadaler JM; Langohr K; Cuenca-Royo A; Principe A; Xicota L; Janel N; Catuara-Solarz S; Sanchez-Benavides G; Bléhaut H; Dueñas-Espín I; Del Hoyo L; Benejam B; Blanco-Hinojo L; Videla S; Fitó M; Delabar JM; Dierssen M; TESDAD study group · The Lancet. Neurology · 2017
Randomized trial87 participantsflagCognitive Support forscienceGreen Tea
- Association between tea consumption and risk of cognitive disorders: A dose-response meta-analysis of observational studies.
Liu X; Du X; Han G; Gao W · Oncotarget · 2018
Meta-analysis48,435 participants17 studies pooledflagCognitive Support forscienceGreen Tea
- Investigating the Impact of Tea Consumption on Cognitive Function and Exploring Tea-Genetic Interactions in Older Adults Aged 65-105 Years: Findings from the 2002-2018 CLHLS Data.
Yu L; Yang M; Ye KX; Li C; Zou M; Wang J; Yuan X; Zheng D; Sun C; Zhang Y; Feng Q; Maier AB; Sun L; Feng L; Wang Y; Chen H; Zeng Y · The journal of prevention of Alzheimer's disease · 2024
Cohort study76,270 participantsflagCognitive Support forscienceGreen Tea
- Consumption of green tea, but not black tea or coffee, is associated with reduced risk of cognitive decline.
Noguchi-Shinohara M; Yuki S; Dohmoto C; Ikeda Y; Samuraki M; Iwasa K; Yokogawa M; Asai K; Komai K; Nakamura H; Yamada M · PloS one · 2014
Cohort study490 participantsflagCognitive Support forscienceGreen Tea
- Green Tea Consumption and the Risk of Incident Dementia in Elderly Japanese: The Ohsaki Cohort 2006 Study.
Tomata Y; Sugiyama K; Kaiho Y; Honkura K; Watanabe T; Zhang S; Sugawara Y; Tsuji I · The American journal of geriatric psychiatry : official journal of the American Association for Geriatric Psychiatry · 2018
Cohort study13,645 participantsflagCognitive Support forscienceGreen Tea
- Assessing the effects of caffeine and theanine on the maintenance of vigilance during a sustained attention task.
Foxe JJ; Morie KP; Laud PJ; Rowson MJ; de Bruin EA; Kelly SP · Neuropharmacology · 2012
Randomized trial27 participantsflagCognitive Support forscienceTheanine
- Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial.
Hidese S; Ogawa S; Ota M; Ishida I; Yasukawa Z; Ozeki M; Kunugi H · Nutrients · 2020
Randomized trial30 participantsflagCognitive Support forscienceTheanine
- Dose-response effect of L-theanine on psychomotor speed, sustained attention, and inhibitory control: a double-blind, placebo-controlled, crossover study.
Dassanayake TL; Wijesundara D; Kahathuduwa CN; Weerasinghe VS · Nutritional neuroscience · 2023
Randomized trial32 participantsflagCognitive Support forscienceTheanine
- Acute effects of theanine, caffeine and theanine-caffeine combination on attention.
Kahathuduwa CN; Dassanayake TL; Amarakoon AMT; Weerasinghe VS · Nutritional neuroscience · 2018
Clinical trial20 participantsflagCognitive Support forscienceTheanine
- Green tea catechins and blood pressure: a systematic review and meta-analysis of randomised controlled trials.
Khalesi S; Sun J; Buys N; Jamshidi A; Nikbakht-Nasrabadi E; Khosravi-Boroujeni H · European journal of nutrition · 2015
Meta-analysis13 studies pooledflagHeart Health forscienceGreen Tea
- Effect of Green Tea on Blood Pressure in Healthy Individuals: A Meta-Analysis.
Yıldırım Ayaz E; Dincer B; Mesci B · Alternative therapies in health and medicine · 2023
Meta-analysis680 participants9 studies pooledflagHeart Health forscienceGreen Tea
- Green tea extract reduces blood pressure, inflammatory biomarkers, and oxidative stress and improves parameters associated with insulin resistance in obese, hypertensive patients.
Bogdanski P; Suliburska J; Szulinska M; Stepien M; Pupek-Musialik D; Jablecka A · Nutrition research (New York, N.Y.) · 2012
Randomized trial56 participantsflagHeart Health forscienceGreen Tea
- Green tea intake lowers fasting serum total and LDL cholesterol in adults: a meta-analysis of 14 randomized controlled trials.
Zheng XX; Xu YL; Li SH; Liu XX; Hui R; Huang XH · The American journal of clinical nutrition · 2011
Meta-analysis1,136 participants14 studies pooledflagHeart Health forscienceGreen Tea
- Effects of green tea on lipid profile in overweight and obese women.
Li A; Wang Q; Li P; Zhao N; Liang Z · International journal for vitamin and nutrition research. Internationale Zeitschrift fur Vitamin- und Ernahrungsforschung. Journal international de vitaminologie et de nutrition · 2024
Meta-analysis1,818 participants15 studies pooledflagHeart Health forscienceGreen Tea
- A Randomized Study to Examine the Ability of a Caffeine-Based Energy Drink to Impact Energy Expenditure, Fat Oxidation, and Cognitive Performance.
Krieger J; Schrautemeier A; Hagele A; Gaige C; Mennemeyer O; Tolbert S; Iannotti J; Kerksick C; Noonan C; Mumford P · Nutrients · 2025
Randomized trial60 participantsflagMetabolism Boost forscienceCaffeine
- Oolong tea increases metabolic rate and fat oxidation in men.
Rumpler W; Seale J; Clevidence B; Judd J; Wiley E; Yamamoto S; Komatsu T; Sawaki T; Ishikura Y; Hosoda K · The Journal of nutrition · 2001
Randomized trial12 participantsflagMetabolism Boost forscienceCaffeine
- Effect of caffeine intake on fat oxidation rate during exercise: is there a dose-response effect?
Gutiérrez-Hellín J; Aguilar-Navarro M; Ruiz-Moreno C; Muñoz A; Varillas-Delgado D; Amaro-Gahete FJ; Del Coso J · European journal of nutrition · 2023
Randomized trial18 participantsflagMetabolism Boost forscienceCaffeine
- Comparison of changes in energy expenditure and body temperatures after caffeine consumption.
Koot P; Deurenberg P · Annals of nutrition & metabolism · 1995
Randomized trial12 participantsflagMetabolism Boost forscienceCaffeine
- Caffeine Increases Work Done above Critical Power, but Not Anaerobic Work.
Silveira R; Andrade-Souza VA; Arcoverde L; Tomazini F; Sansonio A; Bishop DJ; Bertuzzi R; Lima-Silva AE · Medicine and science in sports and exercise · 2018
Randomized trial9 participantsflagMetabolism Boost forscienceCaffeine
- Effect of green tea on glucose control and insulin sensitivity: a meta-analysis of 17 randomized controlled trials.
Liu K; Zhou R; Wang B; Chen K; Shi LY; Zhu JD; Mi MT · The American journal of clinical nutrition · 2013
Meta-analysis1,133 participants17 studies pooledflagMetabolism Boost forscienceGreen Tea
- Green tea extract ingestion, fat oxidation, and glucose tolerance in healthy humans.
Venables MC; Hulston CJ; Cox HR; Jeukendrup AE · The American journal of clinical nutrition · 2008
Randomized trial23 participantsflagMetabolism Boost forscienceGreen Tea
- Efficacy of a green tea extract rich in catechin polyphenols and caffeine in increasing 24-h energy expenditure and fat oxidation in humans.
Dulloo AG; Duret C; Rohrer D; Girardier L; Mensi N; Fathi M; Chantre P; Vandermander J · The American journal of clinical nutrition · 1999
Randomized trial10 participantsflagMetabolism Boost forscienceGreen Tea
- A 60-Day Green Tea Extract Supplementation Counteracts the Dysfunction of Adipose Tissue in Overweight Post-Menopausal and Class I Obese Women.
Rondanelli M; Gasparri C; Perna S; Petrangolini G; Allegrini P; Fazia T; Bernardinelli L; Cavioni A; Mansueto F; Oberto L; Patelli Z; Tartara A; Riva A · Nutrients · 2022
Randomized trial28 participantsflagMetabolism Boost forscienceGreen Tea
- Epigallocatechin gallate alleviates non-alcoholic fatty liver disease through the inhibition of the expression and activity of Dipeptide kinase 4.
Yang M; Yan R; Sha R; Wang X; Zhou S; Li B; Zheng Q; Cao Y · Clinical nutrition (Edinburgh, Scotland) · 2024
Randomized trialflagMetabolism Boost forscienceGreen Tea
- Topical Polyphenon E in the treatment of external genital and perianal warts: a randomized controlled trial.
Stockfleth E; Beti H; Orasan R; Grigorian F; Mescheder A; Tawfik H; Thielert C · The British journal of dermatology · 2008
Randomized trial503 participantsflagSkin Health forscienceGreen Tea
- Efficacy, safety and tolerability of green tea catechins in the treatment of external anogenital warts: a systematic review and meta-analysis.
Tzellos TG; Sardeli C; Lallas A; Papazisis G; Chourdakis M; Kouvelas D · Journal of the European Academy of Dermatology and Venereology : JEADV · 2011
Meta-analysis1,247 participants3 studies pooledflagSkin Health forscienceGreen Tea
- Green tea polyphenols provide photoprotection, increase microcirculation, and modulate skin properties of women.
Heinrich U; Moore CE; De Spirt S; Tronnier H; Stahl W · The Journal of nutrition · 2011
Randomized trial60 participantsflagSkin Health forscienceGreen Tea
- Efficacy of Epigallocatechin-3-Gallate in Preventing Dermatitis in Patients With Breast Cancer Receiving Postoperative Radiotherapy: A Double-Blind, Placebo-Controlled, Phase 2 Randomized Clinical Trial.
Zhao H; Zhu W; Zhao X; Li X; Zhou Z; Zheng M; Meng X; Kong L; Zhang S; He D; Xing L; Yu J · JAMA dermatology · 2022
Randomized trial180 participantsflagSkin Health forscienceGreen Tea