Early research (Phase 1)Study completedNCT04706494What this trial is testingInvestigate the Efficacy of AlphaWave® L-Theanine on StressWho this might be right forStress Ethical Naturals, Inc. 16
Not applicableStudy completedNCT02770105What this trial is testingTheanine and Caffeine on Neurophysiology of AttentionWho this might be right forL-theanine Texas Tech University 9
Very early researchStudy completedNCT03533556What this trial is testingEffects of L-theanine and Caffeine on Attention and Attention-related Brain Activity of Children With Attention Deficit Hyperactivity DisorderWho this might be right forAttention Deficit Hyperactivity Disorder Texas Tech University 6
Post-approval studies (Phase 4)Study completedNCT00981955What this trial is testingThe Effects of Caffeine and L-theanine Both Alone and in Combination on Cerebral Blood Flow, Cognition and MoodWho this might be right forCognitive FunctionMood Northumbria University 24
Not applicableLooking for participantsNCT07189442What this trial is testingL-theanine and Paraxanthine for Cognitive Improvement in Adults With ADHD and ASDWho this might be right forAttention Deficit Hyperactivity Disorder (ADHD)Autism Spectrum Disorder (ASD) Texas Tech University Health Sciences Center 24
Not applicableStudy completedNCT07225608What this trial is testingThe Acute Effects of Liquid IV's Pre-Workout Supplement on Muscle Endurance & Strength, Energy, and CognitionWho this might be right forPhysical PerformanceExercise PerformanceEndurance Exercise+3 more Applied Science & Performance Institute 27
Testing effectiveness (Phase 2)Study completedNCT05808595What this trial is testingThe Safety and Efficacy of AlphaWave® L-Theanine on Adults Who Experience Moderate Stress on a Regular BasisWho this might be right forStress Ethical Naturals, Inc. 30
Not applicableActive Not RecruitingNCT05854017What this trial is testingEffects of a Theanine for Stress Relief Formulation in Individuals Who Report Occasional Moderate High Levels of Stress.Who this might be right forStress Supplement Formulators, Inc. 104
Not applicableStudy completedNCT01851122What this trial is testingThe Effect of the Amino Acid L-Theanine on Alertness and VigilanceWho this might be right forTheanine, (L)-Isomer The University of Texas Health Science Center, Houston 26
Not applicableEnded earlyNCT05450952What this trial is testingEvaluate the Effects of a Theanine Formulation on Stress, Burnout, Mood, and Sleep in Individuals Who Report Occasional Moderate or High Levels of StressWho this might be right forStress Supplement Formulators, Inc. 14
Not applicableLooking for participantsNCT07004023What this trial is testingA Clinical Trial to Assess the Efficacy of a Single-dose of AlphaWave® L-Theanine on Cognitive Function in Healthy Adults With Moderate StressWho this might be right forCognitive FunctionModerate Stress Ethical Naturals, Inc. 40
Not applicableStudy completedNCT01361204What this trial is testingAnti-stress Effect of Theanine on Students During Long-term Pharmacy PracticesWho this might be right forHealthy Students University of Shizuoka 20
Not applicableStudy completedNCT05830565What this trial is testingManagement of Occasional or Anticipatory Stress by Consumers of a Food SupplementWho this might be right forStress Larena SAS 113
Not applicableStudy completedNCT07268573What this trial is testingEffects of Caffeine and L-Theanine on Physical and Cognitive Performance in Trained AthletesWho this might be right forCognitive PerformancePhysical Performance EnhancementCaffeine and L-theanine Interaction Ulaş Can YILDIRIM 20
Not applicableLooking for participantsNCT07135232What this trial is testingThe Effects of Resistance Training and a Plant-Based Supplement on Perimenopausal Symptoms and Muscle Health.Who this might be right forPerimenopauseMenopause Leeds Beckett University 72
Not applicableStudy completedNCT05543811What this trial is testingThe Influence of Food for Special Dietary Use - Spread Enriched With 5-hydroxytryptophan, Theanine and Gamma-aminobutyric Acid on Psychophysiological Functions of Subjects Without Meaningful Organic and Cognitive PathologyWho this might be right forCognitive ChangeMemory; Disturbance, MildEmotional Regulation+1 more Federal State Budgetary Scientific Institution "Federal Research Centre of Nutrition, Biotechnology 140
Not applicableLooking for participantsNCT07319117What this trial is testingEvaluation of the Impact of a Nutritional Formulation on Cognitive Performance Following Stress Exposure.Who this might be right forCognitive AssessmentWorking MemoryExecutive Function (Cognition)+14 more Leeds Beckett University 40
Not applicableUnknownNCT01831986What this trial is testingPregnenolone and L-theanine Augmentation in the Treatment for Schizophrenia and Schizoaffective DisordersWho this might be right forSchizophreniaSchizoaffective Disorder Sha'ar Menashe Mental Health Center 60
Not applicableStudy completedNCT05592561What this trial is testingImpact of Supplements on Stress MarkersWho this might be right forPhysiological Stress Texas State University 109
Not applicableStudy completedNCT07207252What this trial is testingResearch on Sleep and Emotion Testing of Tea Theanine Casein Hydrolysate Pressed CandyWho this might be right forMild to Moderate Sleep DisorderPressure ChinaNorm 171