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Electronic questionnaires not being completed in a timely manner
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The purpose of this study is to assess the effectiveness and safety of the theanine formulation on stress, burnout, mood, and sleep in male and female subjects who are generally healthy
This is a double-blind, randomized, placebo-controlled study to evaluate the effects of a theanine formulation on stress, burnout, mood, and sleep in individuals who are generally healthy.
Participants will be asked to completed assessments and questionnaires as well as obtain a self saliva sample.
The primary objective is to evaluate the change in response to the theanine formulation on stress from completed questionnaires at Day 1, Day 7 and Day 28 relative to the baseline values. The questionnaires utilized for this objective include Depression, Anxiety and Stress Scale (DASS-21), State-Trait Anxiety Inventory (STAI) and Perceived Stress Scale (PSS-14).
The secondary objective is to evaluate the change in response to the theanine formulation on burnout, mood, and sleep at Day 1, Day 7 and Day 28 relative to the baseline values. The questionnaires assessments utilized for this objective include Leeds Sleep Evaluation Questionnaires (LSEQ), Maslach Burnout Inventory General Survey (MBI-GS), Visual Analog Mood Scale (VAMS), Short Form-36 Health Survey (SF-36) and Cortisol levels.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Active | Active Comparator | Dietary Supplement (Theanine Formulation) |
|
| Placebo | Placebo Comparator | Placebo Tablet |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Theanine Formulation | Dietary Supplement | Theanine Formulation Tablet |
| |
| Measure | Description | Time Frame |
|---|---|---|
| Depression, Anxiety and Stress Scale-21 (DASS-21) | Assessment of the mean change in the results of Depression, Anxiety and Stress Scale-21 (DASS-21) from baseline. There are 21 items consisting of three scales (Depression, Anxiety and Stress) contains 7 items and scores from each scale can range from 0-56. The lower the scores for each scale indicates a better outcome. | 28 days |
| State-Trait Anxiety Inventory (STAI) | Assessment of the mean change in the results of the State-Trait Anxiety Inventory (STAI) from baseline. This is a 20-item questionnaire which includes separate measures of state and trait anxiety. The total scores range from 0-63. The lower the score indicates a better outcome. | 28 days |
| Perceived Stress Scale (PSS-14) | Assessment of the mean change in the results of the Perceived Stress Scale (PSS-14) from baseline. There are 14 items and total scores range from 0-56. The lower the score indicates a lower level of stress. | 28 days |
| Measure | Description | Time Frame |
|---|---|---|
| Leeds Sleep Evaluation Questionnaire (LSEQ) | Assessment of the mean change in the results of the Leeds Sleep Evaluation Questionnaires (LSEQ) from baseline. This questionnaire consists of ten self-rating questions related to four consecutive aspects of sleep (getting to sleep, quality of sleep, awakening from sleep and behavior following sleep). The total LSEQ score can range from 0-100. The higher the total global LSEQ score indicates a better outcome. |
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Inclusion Criteria:
Exclusion Criteria:
Not having the basic skills needed to operate a smartphone, tablet, or computer
Unwilling to limit daily caffeine intake to less than 400 mg caffeine per day (~ 95 mg caffeine in a cup of regular coffee) and refrain from consuming any caffeinated beverages/foods after 2 PM daily for the duration of the study
Having smoked any cigarette, electronic cigarette, cigar, pipe, or used a recreational drug as well as any product containing cannabidiol (CBD) or tetrahydrocannabinol (THC) in the past 30 days prior to Screening/baseline
Having donated blood within 30 days before Screening/baseline
Having been diagnosed with dysphagia or difficulty swallowing
Having participated in another study within 30 days prior to Screening/baseline
Being pregnant or planning on becoming pregnant during study participation; or breast feeding
History of allergy or sensitivity to any component of the study products including L-theanine, microcrystalline cellulose, hydroxypropyl methylcellulose, stearic acid, silica, silicon dioxide, vegetable stearate, croscarmellose sodium or glycerin
Are not participating in a stress management program and will not for the duration of the study participation.
Unable to avoid any form of intense exercise or a significant change in your exercise routine during the day of saliva specimen collection
Currently taking supplements including melatonin, 5-hydroxytryptophan, Calamus, California poppy, St. John's wort, S-adenosylmethionine (SAM-E), catnip, hops, kava, valerian, Jamaican dogwood, skullcap, yerba mansa, Hawaiian baby woodrose, L-theanine, magnesium, or any other supplement for stress, burnout, mood, or sleep. These may preclude participation in the study dependent the judgment of the Study Investigator/Sub-Investigator
Having been diagnosed, received medical treatment, taking medication/supplements daily for the following medical condition(s):
Presence of active or recurring clinically significant conditions as follows:
Currently taking or having taken within the 30 days before Screening/baseline any hormone replacement therapy (including dehydroepiandrosterone (DHEA), estrogen, progesterone, or testosterone), except those utilized as a method of birth control and which have been taken for > 3 months with no anticipated change for the duration of the study period
Having had a surgical procedure or having an internal medical device which, in the judgment of the Study Investigator/Sub-Investigator, would preclude participation in the study
Currently consumes more than 4 standard alcoholic drinks per week for women and 7 drinks per week for men (a standard alcoholic drink is defined as one bottle/can of beer, one glass of wine, or one ounce of hard liquor)
Unable or unwilling to avoid consuming grapefruit juice or fresh grapefruit, Seville oranges, and tangelos for the duration of the study period
History of known or suspected substance abuse (e.g., alcohol, opiates, benzodiazepines, or amphetamines)
Having any other circumstance that may preclude study participation in the judgment of the Study Investigator/Sub-Investigator, including use of other nutritional supplements, which will be evaluated on a case-by-case basis
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Life Extension Clinical Research, Inc. | Fort Lauderdale | Florida | 33304 | United States |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 17594144 | Background | Ahn RS, Lee YJ, Choi JY, Kwon HB, Chun SI. Salivary cortisol and DHEA levels in the Korean population: age-related differences, diurnal rhythm, and correlations with serum levels. Yonsei Med J. 2007 Jun 30;48(3):379-88. doi: 10.3349/ymj.2007.48.3.379. | |
| 16759779 | Background | Borzelleca JF, Peters D, Hall W. A 13-week dietary toxicity and toxicokinetic study with l-theanine in rats. Food Chem Toxicol. 2006 Jul;44(7):1158-66. doi: 10.1016/j.fct.2006.03.014. Epub 2006 Apr 26. |
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| Placebo |
| Dietary Supplement |
Placebo Tablet |
|
| 28 days |
| Maslach Burnout Inventory (MBI-GS) | Assessment of the mean change in the results of Maslach Burnout Inventory (MBI-GS) from baseline. This survey consists of 16 statements of job-related feelings. It consists of 3 subscales including Emotional Exhaustion, Depersonalization and Professional Accomplishment. The total score can range from 0 to 96. The lower the score for the Emotional Exhaustion and Depersonalization components represent a better outcome and a higher score for the Professional Accomplishment represents a better outcome. | 28 days |
| Visual Analog Mood Scales (VAMS) | Assessment of the mean change in the results of Visual Analog Mood Scales (VAMS) from baseline. These scales measure eight mood states including Afraid, Confused, Sad, Angry, Energetic, Tired, Happy and Tense. Each score for each mood ranges from 0 to 100. The lower the score for each mood represents a minimal level of that mood and the higher score represents the greater level of that mood. | 28 days |
| Short Form -36 Health Survey (SF-36) | Assessment of the mean change in the results of the Short Form-36 Health Survey (SF-36) from baseline. This is a 36-item questionnaire that covers eight domains including physical functioning, bodily pain, role limitations due to physical health problems, role limitations due to personal or emotional problems, emotional well-being, social functioning, energy/fatigue and general health perceptions. The scores from each domain can range from 0 to 100. The higher the scores for each domain indicates a better outcome. | 28 days |
| Cortisol Levels | Assessment of the mean change in the results of Cortisol levels from baseline | 28 days |
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| 22581646 | Background | Fernandez-Guasti A, Fiedler JL, Herrera L, Handa RJ. Sex, stress, and mood disorders: at the intersection of adrenal and gonadal hormones. Horm Metab Res. 2012 Jul;44(8):607-18. doi: 10.1055/s-0032-1312592. Epub 2012 May 11. |
| 31623400 | Background | Hidese S, Ogawa S, Ota M, Ishida I, Yasukawa Z, Ozeki M, Kunugi H. Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial. Nutrients. 2019 Oct 3;11(10):2362. doi: 10.3390/nu11102362. |
| 27396868 | Background | Hidese S, Ota M, Wakabayashi C, Noda T, Ozawa H, Okubo T, Kunugi H. Effects of chronic l-theanine administration in patients with major depressive disorder: an open-label study. Acta Neuropsychiatr. 2017 Apr;29(2):72-79. doi: 10.1017/neu.2016.33. Epub 2016 Jul 11. |
| Background | Higashiyama, A., Htay, H, Ozeki, M Et Al. (2011). Effects of L-theanine on attention and reaction time response. Journal of Functional Foods, 3, 171-178. |
| 18293419 | Background | Kakuda T, Hinoi E, Abe A, Nozawa A, Ogura M, Yoneda Y. Theanine, an ingredient of green tea, inhibits [3H]glutamine transport in neurons and astroglia in rat brain. J Neurosci Res. 2008 Jun;86(8):1846-56. doi: 10.1002/jnr.21637. |
| 17937582 | Background | Kim EJ, Dimsdale JE. The effect of psychosocial stress on sleep: a review of polysomnographic evidence. Behav Sleep Med. 2007;5(4):256-78. doi: 10.1080/15402000701557383. |
| 30707852 | Background | Kim S, Jo K, Hong KB, Han SH, Suh HJ. GABA and l-theanine mixture decreases sleep latency and improves NREM sleep. Pharm Biol. 2019 Dec;57(1):65-73. doi: 10.1080/13880209.2018.1557698. |
| 16930802 | Background | Kimura K, Ozeki M, Juneja LR, Ohira H. L-Theanine reduces psychological and physiological stress responses. Biol Psychol. 2007 Jan;74(1):39-45. doi: 10.1016/j.biopsycho.2006.06.006. Epub 2006 Aug 22. |
| 17055006 | Background | Levine A, Zagoory-Sharon O, Feldman R, Lewis JG, Weller A. Measuring cortisol in human psychobiological studies. Physiol Behav. 2007 Jan 30;90(1):43-53. doi: 10.1016/j.physbeh.2006.08.025. Epub 2006 Oct 19. |
| 31412272 | Background | Lopes Sakamoto F, Metzker Pereira Ribeiro R, Amador Bueno A, Oliveira Santos H. Psychotropic effects of L-theanine and its clinical properties: From the management of anxiety and stress to a potential use in schizophrenia. Pharmacol Res. 2019 Sep;147:104395. doi: 10.1016/j.phrs.2019.104395. Epub 2019 Aug 11. |
| 21617527 | Background | Miodownik C, Maayan R, Ratner Y, Lerner V, Pintov L, Mar M, Weizman A, Ritsner MS. Serum levels of brain-derived neurotrophic factor and cortisol to sulfate of dehydroepiandrosterone molar ratio associated with clinical response to L-theanine as augmentation of antipsychotic therapy in schizophrenia and schizoaffective disorder patients. Clin Neuropharmacol. 2011 Jul-Aug;34(4):155-60. doi: 10.1097/WNF.0b013e318220d8c6. |
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| 21208586 | Background | Ritsner MS, Miodownik C, Ratner Y, Shleifer T, Mar M, Pintov L, Lerner V. 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. J Clin Psychiatry. 2011 Jan;72(1):34-42. doi: 10.4088/JCP.09m05324gre. Epub 2010 Nov 30. |
| 17891480 | Background | Rogers PJ, Smith JE, Heatherley SV, Pleydell-Pearce CW. Time for tea: mood, blood pressure and cognitive performance effects of caffeine and theanine administered alone and together. Psychopharmacology (Berl). 2008 Jan;195(4):569-77. doi: 10.1007/s00213-007-0938-1. Epub 2007 Sep 23. |
| Background | Rosner, B. (2006). Hypothesis Testing Two-Sample Inference. In Fundamentals of Biostatistics (6th ed., pp. 331-334): Duxbury Press. |
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| Background | WHO (2019) Burn out an occupation phenomenon. International Classification of Diseases. Retrieved from https://www.who.int/news/item/28-05-2019-burn-out-an-occupational-phenomenon-international-classification-of-diseases |
| 31758301 | Background | Williams JL, Everett JM, D'Cunha NM, Sergi D, Georgousopoulou EN, Keegan RJ, McKune AJ, Mellor DD, Anstice N, Naumovski N. The Effects of Green Tea Amino Acid L-Theanine Consumption on the Ability to Manage Stress and Anxiety Levels: a Systematic Review. Plant Foods Hum Nutr. 2020 Mar;75(1):12-23. doi: 10.1007/s11130-019-00771-5. |
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| ID | Term |
|---|---|
| D000077062 | Burnout, Psychological |
| D005221 | Fatigue |
| ID | Term |
|---|---|
| D013315 | Stress, Psychological |
| D001526 | Behavioral Symptoms |
| D001519 | Behavior |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |
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