Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.
- Meta-analysis: melatonin for the treatment of primary sleep disorders.
Ferracioli-Oda E; Qawasmi A; Bloch MH · PloS one · 2013
Meta-analysis1,683 participants19 studies pooledflagSleep Support forscienceMelatonin
- Efficacy on sleep parameters and tolerability of melatonin in individuals with sleep or mental disorders: A systematic review and meta-analysis.
Salanitro M; Wrigley T; Ghabra H; de Haan E; Hill CM; Solmi M; Cortese S · Neuroscience and biobehavioral reviews · 2022
Meta-analysis1,998 participants34 studies pooledflagSleep Support forscienceMelatonin
- Effects of melatonin on postoperative sleep quality: a systematic review, meta-analysis, and trial sequential analysis.
Tsukinaga A; Mihara T; Takeshima T; Tomita M; Goto T · Canadian journal of anaesthesia = Journal canadien d'anesthesie · 2023
Meta-analysis516 participants8 studies pooledflagSleep Support forscienceMelatonin
- Unintended consequences: college students' melatonin usage, sleep disturbance, and depressive symptoms.
Peltz JS; Rogge R · Sleep and biological rhythms · 2025
Cohort study331 participantsflagSleep Support forscienceMelatonin
- The effects of L-theanine consumption on sleep outcomes: A systematic review and meta-analysis.
Bulman A; D'Cunha NM; Marx W; Turner M; McKune A; Naumovski N · Sleep medicine reviews · 2025
Meta-analysis897 participants19 studies pooledflagSleep Support forscienceTheanine
- Theanine maintains sleep quality in healthy young women by suppressing the increase in caffeine-induced wakefulness after sleep onset.
Baba Y; Takihara T; Okamura N · Food & function · 2023
Clinical trialflagSleep Support forscienceTheanine
- Anti-Stress, Behavioural and Magnetoencephalography Effects of an L-Theanine-Based Nutrient Drink: A Randomised, Double-Blind, Placebo-Controlled, Crossover Trial.
White DJ; de Klerk S; Woods W; Gondalia S; Noonan C; Scholey AB · Nutrients · 2016
Randomized trial34 participantsflagStress Relief forscienceTheanine
- Effect of Combined Ingestion of L-Theanine and L-Arginine for Short-Term Psychological Stress in Young Adults: A Randomized Placebo-Controlled Study.
Furushima D; Sugiyama I; Nomura Y; Unno K; Yamada H · Journal of nutritional science and vitaminology · 2023
Randomized trial120 participantsflagStress Relief forscienceTheanine
- Comparative Efficacy, Tolerability, and Acceptability of Donanemab, Lecanemab, Aducanumab, Melatonin, and Aerobic Exercise for a Short Time on Cognitive Function in Mild Cognitive Impairment and Mild Alzheimer's Disease: A Systematic Review and Network Meta-Analysis.
Terao I; Kodama W · Journal of Alzheimer's disease : JAD · 2024
Meta-analysis4,599 participants10 studies pooledflagBrain Health forscienceMelatonin
- Melatonin for sleep and cognitive outcomes in older adults with cognitive impairment: a meta-analysis of randomised controlled trials.
Mdluli NT; Banda KJ; Chang YC · Age and ageing · 2025
Meta-analysis516 participants10 studies pooledflagBrain Health forscienceMelatonin
- Add-on prolonged-release melatonin for cognitive function and sleep in mild to moderate Alzheimer's disease: a 6-month, randomized, placebo-controlled, multicenter trial.
Wade AG; Farmer M; Harari G; Fund N; Laudon M; Nir T; Frydman-Marom A; Zisapel N · Clinical interventions in aging · 2015
Randomized trial80 participantsflagBrain Health forscienceMelatonin
- Early Oral Melatonin Supplementation Supports White Matter Maturation in Preterm Infants: Neuroprotective Insights of an Antioxidant Molecule.
Garofoli F; Asteggiano C; Minniti ML; Accorsi P; Albertini R; Angelini M; Aversa S; Ballante E; Cabini RF; Caporali C; Cociglio S; Franco V; Longo S; Malerba L; Materia V; Mazzocchi L; Naboni C; Palmisani M; Pullega C; Pisoni C; Preda L; Riboli A; Risso FM; Rognone E; Savini G; Simoncelli AM; Villani P; Tzialla C; Pinelli L; Fazzi E; Chiapparini L; Borgatti R; Ghirardello S; Pichiecchio A; Orcesi S · Journal of pineal research · 2026
Randomized trial54 participantsflagBrain Health forscienceMelatonin
- Efficacy and Safety of Melatonin in Migraine Prophylaxis: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.
Abouelmagd ME; Aldemerdash MA; Khatatbeh AA; Osman ASA; Abbas A; Allam S; AlEdani EM; Aldemerdash A; Monteith TS · Current pain and headache reports · 2026
Meta-analysis788 participants9 studies pooledflagBrain Health forscienceMelatonin
- 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 participantsflagBrain Health flagSleep Support forscienceTheanine
- A Randomized, Triple-Blind, Placebo-Controlled, Crossover Study to Investigate the Efficacy of a Single Dose of AlphaWave® L-Theanine on Stress in a Healthy Adult Population.
Evans M; McDonald AC; Xiong L; Crowley DC; Guthrie N · Neurology and therapy · 2021
Randomized trialflagBrain Health flagStress Relief forscienceTheanine
- 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 pooledflagBrain Health forscienceTheanine
- 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 participantsflagBrain Health forscienceTheanine
- Effects of l-Theanine on Cognitive Function in Middle-Aged and Older Subjects: A Randomized Placebo-Controlled Study.
Baba Y; Inagaki S; Nakagawa S; Kaneko T; Kobayashi M; Takihara T · Journal of medicinal food · 2021
Randomized trialflagBrain Health forscienceTheanine
- Melatonin treatment for age-related insomnia.
Zhdanova IV; Wurtman RJ; Regan MM; Taylor JA; Shi JP; Leclair OU · The Journal of clinical endocrinology and metabolism · 2001
Randomized trial30 participantsflagSleep Support forscienceMelatonin
- The Effectiveness of Melatonin for Sleep Disturbances in Parkinson' Disease: Systematic Review and Meta-Analysis.
Yousef O; Abouelmagd ME; Khaddam H; Shbani A; Yousef R; Meshref M; Hanafi I · Journal of sleep research · 2026
Meta-analysis409 participants8 studies pooledflagSleep Support forscienceMelatonin
- Nightly treatment of primary insomnia with prolonged release melatonin for 6 months: a randomized placebo controlled trial on age and endogenous melatonin as predictors of efficacy and safety.
Wade AG; Ford I; Crawford G; McConnachie A; Nir T; Laudon M; Zisapel N · BMC medicine · 2010
Randomized trial791 participantsflagSleep Support forscienceMelatonin
- Effects of exogenous melatonin on sleep: a meta-analysis.
Brzezinski A; Vangel MG; Wurtman RJ; Norrie G; Zhdanova I; Ben-Shushan A; Ford I · Sleep medicine reviews · 2005
Meta-analysis284 participants8 studies pooledflagSleep Support forscienceMelatonin
- Comparison Between Efficacy of Oral Melatonin and Oral L-theanine in Improving Sleep in Cancer Patients Suffering From Insomnia: A Randomised Double-blinded Placebo-controlled Study.
Kurdi MS; As A; Ladhad DA; Mitragotri MV; Baiju A · Indian journal of palliative care · 2024
Randomized trial120 participantsflagSleep Support forscienceTheanine
- In Search of a Safe Natural Sleep Aid.
Rao TP; Ozeki M; Juneja LR · Journal of the American College of Nutrition · 2016
Narrative reviewflagSleep Support forscienceTheanine
- L-theanine in the adjunctive treatment of generalized anxiety disorder: A double-blind, randomised, placebo-controlled trial.
Sarris J; Byrne GJ; Cribb L; Oliver G; Murphy J; Macdonald P; Nazareth S; Karamacoska D; Galea S; Short A; Ee C; Birling Y; Menon R; Ng CH · Journal of psychiatric research · 2020
Randomized trial46 participantsflagSleep Support forscienceTheanine
- The impact of oral melatonin on pain and anxiety reduction during venipuncture in pediatric patients: a double-blind randomized clinical trial.
Rahafard S; Akbari Jokar Z; Hosseini SA; Alaee E · Annals of medicine and surgery (2012) · 2024
Randomized trial202 participantsflagStress Relief forscienceMelatonin
- Comparison of Effects of Melatonin and Gabapentin on Post Operative Anxiety and Pain in Lumbar Spine Surgery: A Randomized Clinical Trial.
Javaherforooshzadeh F; Amirpour I; Janatmakan F; Soltanzadeh M · Anesthesiology and pain medicine · 2022
Randomized trial90 participantsflagStress Relief forscienceMelatonin
- Melatonin for pre- and postoperative anxiety in adults.
Hansen MV; Halladin NL; Rosenberg J; Gögenur I; Møller AM · The Cochrane database of systematic reviews · 2015
Meta-analysis774 participants12 studies pooledflagStress Relief forscienceMelatonin
- Effects of melatonin intake on depression and anxiety in postmenopausal women: a systematic review and meta-analysis of randomised controlled trials.
Demirhan Kayacik A; İlcioglu K · Archives of women's mental health · 2024
Meta-analysis441 participants5 studies pooledflagStress Relief forscienceMelatonin
- Premedication effect of melatonin on propofol induction dose for anesthesia, anxiety, orientation and sedation after abdominal surgery: a double-blinded randomized trial.
Norouzi A; Fateh S; Modir H; Kamali A; Akrami L · Medical gas research · 2020
Randomized trial88 participantsflagStress Relief forscienceMelatonin
- L-theanine relieves positive, activation, and anxiety symptoms in patients with schizophrenia and schizoaffective disorder: an 8-week, randomized, double-blind, placebo-controlled, 2-center study.
Ritsner MS; Miodownik C; Ratner Y; Shleifer T; Mar M; Pintov L; Lerner V · The Journal of clinical psychiatry · 2011
Randomized trial60 participantsflagStress Relief forscienceTheanine
- Safety and Efficacy of AlphaWave® L-Theanine Supplementation for 28 Days in Healthy Adults with Moderate Stress: A Randomized, Double-Blind, Placebo-Controlled Trial.
Moulin M; Crowley DC; Xiong L; Guthrie N; Lewis ED · Neurology and therapy · 2024
Randomized trial30 participantsflagStress Relief forscienceTheanine
- Comparison of the effects of two amino acids, Gamma-aminobutyric acid (GABA) and L-theanine, on sedation, anxiety, and cognition in preoperative surgical patients - A randomized controlled study.
Deshpande SS; Kurdi M; Baiju A; Athira AS; Sarasamma AG; Gangadharan AK · Journal of anaesthesiology, clinical pharmacology · 2025
Randomized trial168 participantsflagStress Relief forscienceTheanine