| Cystine & Theanine (CT) study: for less invasiveness of laparoscopic colorectomy | Cystine & Theanine (CT) study: for less invasiveness of laparoscopic colorectomy - CT study | JPRN-UMIN000015570 |
| Effects of L-Theanine in Boys With ADHD | A Double Blind, Randomized Placebo Controlled Clinical Trial Examining the Effects of L-Theanine (Suntheanine®) in Male Child Subjects With Attention Deficit Hyperactivity Disorder | NCT00291070 |
| Effects of a Theanine for Stress Relief Formulation in Individuals Who Report Occasional Moderate High Levels of Stress. | A Double-blind, Randomized, Placebo-controlled Study to Evaluate the Effects of a Theanine for Stress Relief Formulation on Stress, Burnout Component, Mood, and Sleep in Individuals Who Report Occasional Moderate or High Levels of Stress | NCT05854017 |
| The effect of supplementation with a blackcurrant drink containing L-theanine and pine bark extract in supporting cognitive performance in healthy older adults | Investigating the effect of acute and long-term supplementation with a blackcurrant beverage containing L-theanine and pine bark extract in supporting cognitive performance in healthy older adults. | ACTRN12621001590853 |
| A study for evaluating effects of ingested amino acids, cystine and theanine, on postoperative amount of activity. | A study for evaluating effects of ingested amino acids, cystine and theanine, on postoperative amount of activity. - A study for evaluating effects of ingested amino acids, cystine and theanine, on postoperative amount of activity. | JPRN-UMIN000020779 |
| L-Theanine in the Adjunctive Treatment of Generalised Anxiety Disorder: A Double-Blind Randomised Placebo-Controlled Trial | L-Theanine in the Adjunctive Treatment of Generalised Anxiety Disorder: A Double-Blind Randomised Placebo-Controlled Trial | ACTRN12616000759493 |
| Investigation of the effect of L-theanine on improving sleep habits | Investigation of the effect of L-theanine on improving sleep habits - Investigation of the effect of L-theanine on improving sleep habits | JPRN-UMIN000052597 |
| Perioperative oral administration of Cystine and Theanine enhances recovery after thoracoscopic esophagectomy | Perioperative oral administration of Cystine and Theanine enhances recovery after thoracoscopic esophagectomy - Perioperative oral administration of Cystine and Theanine enhances recovery after thoracoscopic esophagectomy | JPRN-UMIN000024849 |
| Theanine and Caffeine on Neurophysiology of Attention | Neurophysiological Correlates of L-theanine, Caffeine and Their Combination on Improving Selective Attention in a Visual Reaction Time Task: A Functional Magnetic Resonance Imaging (fMRI) Study | NCT02770105 |
| Ameliorating effect of food product including Theanine and Casein peptide on sleep in postmenopausal women with complain of deteriorated sleep health : A randomized, double blind, placebo-controlled trial | Ameliorating effect of food product including Theanine and Casein peptide on sleep in postmenopausal women with complain of deteriorated sleep health : A randomized, double blind, placebo-controlled trial - Effect of Theanine and Casein peptide on sleep: A randomized, double blind, placebo-controlled trial | JPRN-UMIN000018725 |
| Comparing the effectiveness of the combination of caffeine, L-theanine and piperin compared to placebo and pure caffeine in increasing attention | Investigating the effectiveness of capsules containing the combination of caffeine, L-theanine and piperin compared to pure caffeine and placebo in improving attention in healthy people | IRCT20160306026938N19 |
| The effect of green tea amino acid L-Theanine formulation on markers of stress and quality of sleep (THESLeep Project) | The effect of green tea amino acid L-Theanine formulation on markers of stress and quality of sleep in adults with mild to moderate sleep disturbances (THESLeep Project). | ACTRN12623000776606 |
| Exploratory randomized controlled trial of cystine-theanine for cancer cachexia | An exploratory randomized controlled trial of cystine-theanine for cancer cachexia - An exploratory randomized controlled trial of cystine-theanine for cancer cachexia | JPRN-jRCTs021240010 |
| The Effect of the Amino Acid L-Theanine on Alertness and Vigilance | The Effect of the Amino Acid L-Theanine on Alertness and Vigilance | NCT01851122 |
| Effect of L-theanine on depressive symptoms | Effect of L-theanine on depressive symptoms - Effect of L-theanine on depressive symptoms | JPRN-UMIN000014653 |
| Effectiveness of combined use of theanine and arginine for psychological stress | Effectiveness of combined use of theanine and arginine for psychological stress - Effectiveness of combined use of theanine and arginine for psychological stress | JPRN-UMIN000040967 |
| Effects of L-theanine and Caffeine on Attention and Attention-related Brain Activity of Children With Attention Deficit Hyperactivity Disorder | Effects of L-theanine and Caffeine on Attention and Attention-related Brain Activity of Male Children and Adolescents With Attention Deficit Hyperactivity Disorder: a proof-of- Concept fMRI Study. | NCT03533556 |
| Acute effects of a single dose of L-theanine and caffeine combination compared to a placebo on reaction time, and brain activity underlying selective attention in acutely sleep-deprived healthy adults. | Acute effects of a single dose of L-theanine and caffeine combination on selective attention in acutely sleep-deprived healthy adults | SLCTR/2023/006 |
| Effects of Caffeine, L-Theanine, and Diaphragmatic Breathing on Esports Players' Performance | Can L-Theanine Supplementation or Diaphragmatic Breathing Exercises in Addition to Caffeine Supplementation Be Used as Ergogenic Aids to Influence Game Performance in Esports Players? | NCT06621797 |
| A study for evaluating efficacy of cystine and theanine against peripheral neuropathy of oxaliplatin as a supportive treatment | A study for evaluating efficacy of cystine and theanine against peripheral neuropathy of oxaliplatin as a supportive treatment - A study for evaluating efficacy of cystine and theanine against peripheral neuropathy of oxaliplatin as a supportive treatment | JPRN-UMIN000020456 |
| L-Theanine for the treatment of obsessive-compulsive disorder | L-Theanine combination therapy with Fluvoxamine in moderate to severe obsessive-compulsive disorder: A placebo-controlled, double-blind, randomized trial | IRCT20090117001556N134 |
| The Effects of Caffeine and L-theanine Both Alone and in Combination on Cerebral Blood Flow, Cognition and Mood | A Randomised, Double Blind, Placebo-controlled Study to Evaluate the Effects of Caffeine and L-theanine Both Alone and in Combination on Cerebral Blood Flow, Cognition and Mood. | NCT00981955 |
| L-Theanine as an adjuvant therapy in the treatment of major depressive disorder | L-Theanine as an adjuvant therapy in the treatment of major depressive disorder: a double-blind, randomized, placebo-controlled clinical trial | IRCT20090117001556N131 |
| L-Theanine as an adjuvant therapy for chronic schizophrenia | L-Theanine as an adjuvant therapy added to Risperidone for the treatment of patients with chronic schizophrenia: A randomized double blind and placebo controlled clinical trial | IRCT20090117001556N133 |
| effects of use of pre operattive l theanine and gaba | COMPARISON OF THE EFFECTS OF TWO AMINO ACIDS: GAMMA-AMINOBUTYRIC ACID AND L-THEANINE ON SEDATION, ANXIETY AND COGNITION IN PRE-OPERATIVE SURGICAL PATIENTS-A RANDOMISED CONTROLLED TRIAL - CTGLSAC | CTRI/2021/08/035694 |
| Efficacy of Oral Administration of Cystine and Theanine in Colorectal Cancer Patients Undergoing Capecitabine based Adjuvant Chemotherapy after Surgery: Randomized, Double-blind, Placebo controlled, Phase-II Study | Efficacy of Oral Administration of Cystine and Theanine in Colorectal Cancer Patients Undergoing Capecitabine based Adjuvant Chemotherapy after Surgery: Randomized, Double-blind, Placebo controlled, Phase-II Study - Efficacy of Cystine and Theanine in Colorectal Cancer Patients Undergoing Capecitabine after Surgery: Placebo controlled, Phase-II Study | JPRN-UMIN000024784 |
| Effect of a formulation containing blackcurrant powder, L-theanine and pine bark extract on immune responses to influenza vaccine in older healthy adults | Effect of a formulation containing blackcurrant powder, L-theanine and pine bark extract on immune responses to influenza vaccine in older healthy adultsA multi-centred, randomised, double blind, placebo controlled, parallel study | ACTRN12621001561875 |
| L-Theanine in the Management of Schizophrenia | The Value of Augmenting L-Theanine in the Management of Schizophrenia: A Randomized, Double-Blind, Placebo-Controlled Clinical Trial | NCT00372151 |
| An evaluation of theanine consumption on sleeping and stress in middle-aged and older males | An evaluation of theanine consumption on sleeping and stress in middle-aged and older males - An evaluation of theanine consumption on sleeping and stress in middle-aged and older males | JPRN-UMIN000046373 |
| Evaluate the Effects of a Theanine Formulation on Stress, Burnout, Mood, and Sleep in Individuals Who Report Occasional Moderate or High Levels of Stress | A Double-blind, Randomized, Placebo-controlled Study to Evaluate the Effects of a Theanine Formulation on Stress, Burnout, Mood, and Sleep in Individuals Who Report Occasional Moderate or High Levels of Stress | NCT05450952 |
| Anti-stress Effect of Theanine on Students During Long-term Pharmacy Practices | Measurement of Stress Symptom in Students During Long-term Pharmacy Practices and Evaluation of Anti-stress Effect of Theanine Consumption on Students | NCT01361204 |
| The anxiolytic and cognitive effects of L-theanine | The anxiolytic and cognitive effects of L-theanine - The anxiolytic and cognitive effects of L-theanine | NL-OMON47787 |
| A Clinical Trial to Assess the Efficacy of AlphaWave® L-Theanine on Cognitive Function in Healthy Adults With Moderate Stress | A Randomized, Triple-blind, Placebo Controlled, Cross-over Clinical Trial to Assess the Efficacy of AlphaWave® L-Theanine on Cognitive Function in Healthy Adults With Moderate Stress | NCT07004023 |
| Effects of L-theanine on Motor Cortex Excitability in Healthy Subjects: A Paired-Pulse TMS Study | Effects of Single-dose L-theanine on Motor Cortex Excitability in Healthy Subjects: A Double-blinded, Randomized Order, Cross-over Paired-Pulse Transcranial Magnetic Stimulation Study | NCT04749745 |
| Assessment of anti-stress, behavioural, and neurophysiological effects of L-theanine: A randomised, double-blind, placebo-controlled, crossover trial | Assessment of anti-stress, behavioural, and neurophysiological effects of L-theanine: A randomised, double-blind, placebo-controlled, crossover trial in healthy adults | ACTRN12614000826640 |
| The effectiveness of L-theanine-caffeine combination given as a supplement compared to methylphenidate and placebo on improvement of selective attention in adolescents (age 10-19 years old) with attention-deficit hyperactive disorder: a double-blind, 3-way crossover trial | Acute effects of L-theanine and caffeine combination on selective attention in adolescents with attention deficit hyperactivity disorder | SLCTR/2023/004 |
| Pregnenolone and L-theanine Augmentation in the Treatment for Schizophrenia and Schizoaffective Disorders | Addition of Both Pregnenolone and L-theanine to Ongoing Antipsychotic Treatment for Schizophrenia and Schizoaffective Disorders: an 8-week, Randomized, Double-blind, Placebo-controlled Multicenter Study | NCT01831986 |
| The oral administration of amino acids cystine and theanine for patients with advanced EGFR mutation-positive non-small-cell lung cancer | The oral administration of amino acids cystine and theanine for patients with advanced EGFR mutation-positive non-small-cell lung cancer - Trial of amino acids cystine and theanine | JPRN-UMIN000020781 |
| The Safety and Efficacy of AlphaWave® L-Theanine on Adults Who Experience Moderate Stress on a Regular Basis | A Randomized, Double-blind, Placebo Controlled, Parallel Clinical Trial to Investigate the Efficacy of AlphaWave® L-Theanine on Adults Who Experience Moderate Stress on a Regular Basis | NCT05808595 |
| Effects of L-theanine and GABA on sleep | Before-after study on the effects of L-theanine and GABA on sleep in adults with sleep problems. - Before-after study on the effects of L-theanine and GABA on sleep | JPRN-UMIN000050613 |
| Study on work efficiency and fatigue improvement effect of green tea containing high theanine | Study on work efficiency and fatigue improvement effect of green tea containing high theanine - Effect of green tea containing high theanine | JPRN-UMIN000034209 |
| Effect of L-theanine on depressive symptoms and cognitive functions | Effect of L-theanine on depressive symptoms and cognitive functions - Effect of L-theanine on depressive symptoms and cognitive functions | JPRN-UMIN000028603 |
