$12.60 $0.13 per serving
Product analysis
L-Theanine may help with relaxation and some aspects of sleep quality. Benefits for focus are more limited and vary across tasks.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality20
The theanine form is not disclosed in the ingredient details. That limits confidence when comparing the precise form with other supplements.
Ingredient Transparency63
The theanine amount is clearly listed. Its precise form is not disclosed, so amount comparisons are easier than form comparisons.
Value For Money100
Theanine is offered at a favorable cost for the amount provided. That supports its value if you are specifically looking for this ingredient.
Customer Satisfaction79
Customer ratings are very positive across hundreds of reviews. The feedback shows satisfaction rather than proof of sleep or stress benefits.
Product Focus76
The clearest fit is relaxation and some aspects of sleep quality. Support for attention is narrower, while lasting mood improvement remains uncertain.
- Format
Powder - Container
- 1 Liquid(s)
- Per serving
- $0.13
- Customer rating
- 4.7 · 740 ratings
Goals
Impact
High effect
Theanine · 285 mg
Theanine may ease tension and responses to stressful tasks through relaxation. The 285 mg serving sits within the supplied quantity reference range. Findings for sustained mood and anxiety are mixed, so short-term relaxation does not establish durable relief from everyday stress.
How this product is rated for Stress Relief
Ingredient fit92
Theanine is the sole counted active and has a directly relevant calming role.
Goal fit
The formula centers on theanine, although the product is linked to several goals.
Dose adequacy
The 285 mg theanine serving meets the full amount reference.
Pathways71
Theanine contributes mainly to calming, with additional sleep-recovery coverage in the saved findings.
Depth
Neural calming is the strongest covered pathway.
Breadth
Calming and sleep recovery meet the saved coverage criterion; stress-hormone, mood and resilience pathways do not.
Evidence77
Theanine has direct tension and stress-task findings, with mixed results for lasting mood and anxiety changes.
Evidence strength
Theanine supplies the strongest evidence here, with uncertainty about sustained stress relief.
Studied preparation
The supplied theanine preparation meets the saved studied-preparation criterion.
Formulation logic100
The counted ingredients have no missing required partner, and no configured conflict was found.
Partner coverage
The counted ingredients can contribute without an additional required partner.
Conflicts
No configured ingredient conflict was identified in the supplied facts.
Effective doses
The counted ingredient meets the saved minimum amount criterion; this does not guarantee stress relief.
Impact
High effect
Theanine · 285 mg
L-theanine offers modest support for selective attention, with mixed results across tasks. Its standalone effects do not establish broad improvements in concentration. The 285 mg per serving receives full amount recognition in the saved result, which does not mean that larger amounts produce greater benefits.
How this product is rated for Mental Focus
Ingredient fit92
L-theanine is the relevant ingredient, with full recognition for its serving amount.
Goal fit
L-theanine is the focus-related ingredient; the product is also linked to several other goals.
Dose adequacy
The recognized ingredients reach the saved amount benchmarks per serving; this does not prove extra benefit above adequate intake.
Pathways60
The saved pathway coverage is centered on calm attention.
Depth
Calm attention is the strongest saved pathway for theanine.
Breadth
Only one focus pathway reached the saved coverage benchmark, limiting breadth.
Evidence79
Theanine has mixed, task-specific attention evidence.
Evidence strength
Theanine’s evidence is mixed and task-specific, supporting modest expectations.
Studied preparation
The saved findings treat the recognized preparations as studied; population, timing and task limitations still apply.
Formulation logic84
Theanine retains standalone recognition despite a missing expected partner. No configured conflict was matched.
Partner coverage
Theanine lacks the partner expected by the saved formulation finding; it retains standalone recognition.
Conflicts
No configured conflict was matched in the supplied findings; this is not a general safety assessment.
Effective doses
All ingredients counted in this finding meet its minimum amount threshold; that threshold is not proof of efficacy.
Impact
High effect
Theanine · 285 mg
Theanine has limited evidence for fewer sustained-attention errors in a small standalone study. This supports an attention-related possibility, without demonstrating improved work output or guaranteeing calmness. The declared serving receives amount recognition, but larger amounts have not been shown to improve productivity further.
How this product is rated for Productivity Boost
Ingredient fit92
Relevant ingredients have declared amounts, but preparation and population differences limit what their amount comparisons mean.
Goal fit
The recognized ingredients are focused on the supplied productivity comparison, with scientific applicability depending on the ingredient.
Dose adequacy
Declared amounts reach the supplied comparison range; that range does not establish a proven productivity dose.
Pathways60
Theanine supplies the strongest assigned attention route, without a guarantee of calmness or improved work output.
Depth
Theanine supplies the strongest assigned attention route, without a guarantee of calmness or improved work output.
Breadth
Only one assigned route reaches the supplied coverage criterion, so the findings show limited breadth.
Evidence74
Theanine has a small standalone attention study; greater amounts and combination effects do not establish greater productivity.
Evidence strength
Theanine has a small standalone attention study; greater amounts and combination effects do not establish greater productivity.
Studied preparation
The supplied comparison accepts the relevant preparations, without establishing that every form or delivery method improves work output.
Formulation logic100
No listed conflict or missing required partner is identified. Amount comparisons do not demonstrate extra benefit from the formulation.
Partner coverage
No required partner is missing among the recognized ingredients; this does not establish synergy.
Conflicts
No listed conflict is triggered by the supplied facts.
Effective doses
All recognized ingredients meet the minimum amount comparison, which is not a proven biological threshold.
Impact
Highest effect
Theanine · 285 mg
Theanine may support selected verbal-fluency or executive tasks, but the small standalone trial's cognitive advantage was limited to people with lower starting performance. Its 285 mg per serving meets the saved exposure comparison, without establishing more benefit than the 200 mg daily amount studied. Relaxation alone does not demonstrate improved cognition.
How this product is rated for Cognitive Support
Ingredient fit92
Theanine is the sole recognized active and meets the full saved amount comparison.
Goal fit
The single relevant ingredient gives a focused formulation, although the product has several linked purposes.
Dose adequacy
The theanine amount meets the full saved exposure comparison; additional quantity does not establish additional benefit.
Pathways51
Theanine represents stress and arousal regulation, with no broader pathway coverage.
Depth
Stress and arousal regulation is the strongest and only represented pathway.
Breadth
One pathway meets the saved coverage threshold, so the pathway range is narrow.
Evidence81
Theanine's evidence is limited by a small trial and subgroup-specific cognitive findings. Its preparation meets the saved comparison.
Evidence strength
Theanine supplies the evidence contribution, with limited standalone cognitive findings in a low-baseline subgroup.
Studied preparation
The theanine preparation meets the saved preparation comparison.
Formulation logic100
Theanine meets the minimum amount threshold and needs no missing partner. No listed conflict was found.
Partner coverage
Theanine can be considered alone; a caffeine partner is not required.
Conflicts
No listed ingredient conflict was found.
Effective doses
Theanine reaches the saved minimum exposure threshold, which does not guarantee an individual cognitive effect.
Impact
Highest effect
Theanine · 285 mg
Theanine may help with relaxation and some aspects of sleep quality. Small studies reported improvements after repeated use, so a serving should not be expected to act as a proven immediate sedative. The declared L-theanine amount meets the saved amount criteria, with support centered on calming and a smaller contribution related to stress.
How this product is rated for Sleep Support
Ingredient fit92
L-theanine provides the direct sleep connection and meets the saved amount criteria.
Goal fit
Theanine is the sole credited active, although the product is linked to several goals.
Dose adequacy
The declared theanine amount meets the saved amount criteria.
Pathways73
Calming is the main represented area, with a smaller stress-related contribution.
Depth
Calming is the most strongly represented area.
Breadth
Calming and stress-related support are represented; sleep timing is not.
Evidence86
Small theanine studies support some sleep-quality outcomes but leave uncertainty about individual effects.
Evidence strength
Theanine supplies the strongest evidence here, based on small repeated-use studies.
Studied preparation
The declared L-theanine form was accepted as a studied preparation.
Formulation logic100
Theanine can contribute alone, and no listed sleep-related conflict was matched.
Partner coverage
Theanine does not require a partner to contribute.
Conflicts
No listed conflicting ingredient was matched.
Effective doses
Theanine clears the saved amount threshold without establishing an immediate sedative effect.
Impact
High effect
L-theanine may support calm attention in the short term, based on small trials. The 285 mg per serving exceeds the 200 mg acute-study comparison amount, without evidence here of greater benefit from the extra amount. This limited attention role does not establish broad memory improvement or lasting protection against cognitive decline.
How this product is rated for Brain Health
Ingredient fit92
The relevant ingredients and their declared amounts support the specific roles described here, with the amount findings detailed below.
Goal fit
The relevant ingredients make this a focused formula for the brain-related roles described here.
Dose adequacy
The declared amounts fully meet the saved amount comparisons; this does not establish that each serving produces a cognitive benefit.
Pathways48
The supplied findings link the ingredients to the processes described below; those links are distinct from demonstrated cognitive outcomes.
Depth
The strongest assigned connection is stress and arousal regulation; this mechanistic connection does not itself establish improved cognition.
Breadth
One listed pathway has meaningful assigned coverage, so the connection is narrow.
Evidence78
The supplied evidence varies by ingredient, preparation and population. The findings below retain those distinctions.
Evidence strength
Theanine leads the saved evidence comparison, with benefits limited to the population and role described in the supplied context.
Studied preparation
The saved comparison recognizes the declared preparations; this does not establish that the product matches every study population or use pattern.
Formulation logic100
The supplied findings identify no unmet partner requirements or assigned conflicts, and the credited ingredients meet the minimum amount threshold.
Partner coverage
The credited ingredients have no unmet partner requirement in the supplied findings; this does not establish an added combination benefit.
Conflicts
No conflict was identified by the supplied checks; this is not a broader safety assessment.
Effective doses
All credited ingredients meet the saved minimum amount threshold, which is a comparison cutoff rather than a proven effective cognitive dose.
Impact
Moderate effect
Theanine may ease tension associated with stress, which could help you feel calmer during mentally demanding tasks. That is a narrower benefit than a lasting improvement in mood. Whether it helps with ongoing low mood is unclear, so the most useful expectation is possible relief from stress-related tension.
How this product is rated for Mood Support
Ingredient fit92
Theanine is most relevant to easing stress-related tension rather than sustained relief of low mood.
Goal fit
Theanine is most relevant to easing stress-related tension rather than sustained relief of low mood.
Dose adequacy
Theanine supplies 285 mg per serving.
Pathways43
The main connection involves calming nerve activity; its practical relevance depends on the ingredient and whether low nutrient levels are involved.
Depth
The main connection involves calming nerve activity; its practical relevance depends on the ingredient and whether low nutrient levels are involved.
Breadth
The main connection involves calming nerve activity; its practical relevance depends on the ingredient and whether low nutrient levels are involved.
Evidence61
Theanine may ease stress-related tension; sustained improvement in low mood is less clear.
Evidence strength
Theanine may ease stress-related tension; sustained improvement in low mood is less clear.
Studied preparation
The named ingredients are identified; a matching ingredient identity alone does not guarantee the same mood benefit in every person.
Formulation logic100
No particular ingredient conflict or missing required partner is identified. Declared amounts describe one serving, not a confirmed daily regimen.
Partner coverage
No required ingredient partner is missing for the relevant ingredients.
Conflicts
No particular ingredient conflict is identified.
Effective doses
Theanine supplies 285 mg per serving.
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
L-Theanine | 285 mg |
Theanine · 285 mg OverallScore84
Each serving provides 285 mg of L-theanine, a higher amount that may cause mild lethargy in some people. The whole-product price works out to about $0.05 per 100 mg of theanine.
How this ingredient is rated
Active Ingredient Quality & Bioavailability80
The form is identified as L-theanine; the available facts do not record a branded source or purity claim.
Isomer Specificity (L-Theanine)
The form is identified as L-theanine.
Branded Forms & Purity Standards
The available facts do not record a branded source or purity claim.
Dose, Safety & Label Transparency79
The separately disclosed 285 mg of L-theanine per serving is a higher amount that may cause mild lethargy in some people.
Theanine Dosage Efficacy
The 285 mg per serving is a higher amount that may cause mild lethargy in some people.
Label Transparency & Blends
The 285 mg of L-theanine per serving is separately disclosed.
Value100
The whole-product price is about $0.05 per 100 mg of theanine, a low cost on this basis.
Price per 100mg L-Theanine
The whole-product price is about $0.05 per 100 mg of theanine, a low cost on this basis.
Alternative products
Report alternatives
Sources
Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.
- Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial.
- 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.
- 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.
- Assessing the effects of caffeine and theanine on the maintenance of vigilance during a sustained attention task.
- Effects of l-Theanine on Cognitive Function in Middle-Aged and Older Subjects: A Randomized Placebo-Controlled Study.
- Dose-response effect of L-theanine on psychomotor speed, sustained attention, and inhibitory control: a double-blind, placebo-controlled, crossover study.
- Acute effects of theanine, caffeine and theanine-caffeine combination on attention.
- Safety and Efficacy of AlphaWave® L-Theanine Supplementation for 28 Days in Healthy Adults with Moderate Stress: A Randomized, Double-Blind, Placebo-Controlled Trial.
- Effect of L-theanine on selective attention in a traffic-related reaction task in sleep-deprived young adults: a double-blind placebo-controlled, crossover study.
- l-theanine adjunct to sertraline for major depressive disorder: A randomized, double-blind, placebo-controlled clinical trial.
- 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.
- The Effects of Green Tea Amino Acid L-Theanine Consumption on the Ability to Manage Stress and Anxiety Levels: a Systematic Review.
- 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.
- Anti-stress effect of theanine on students during pharmacy practice: positive correlation among salivary α-amylase activity, trait anxiety and subjective stress.
- Cognitive and affective effects of L-Theanine: a systematic review and meta-analysis of 31 randomized trials.
- Effects of L-theanine on cognition, mood and sleep: evidence from human trials.
- Time for tea: mood, blood pressure and cognitive performance effects of caffeine and theanine administered alone and together.
- 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.
- The effects of L-theanine consumption on sleep outcomes: A systematic review and meta-analysis.
- In Search of a Safe Natural Sleep Aid.