L-Theanine 100 mg
Goals
$9.43 $0.15 per serving
Product analysis
L-Theanine 100 mg offers good value for a simple calming approach that may ease tension during stressful tasks. Its benefits appear modest and do not establish a lasting lift in mood or thinking ability.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality20
The exact theanine form is not clearly specified, limiting a close quality comparison. That uncertainty does not establish poor quality or poor absorption.
Ingredient Transparency63
The theanine amount is listed, making serving strength easy to compare. Its exact form is not clearly specified, leaving the ingredient description less complete.
Value For Money80
The cost relative to the amount of theanine is favorable. The single-ingredient formula makes that comparison straightforward.
Customer Satisfaction91
Customer feedback is positive across a very large number of ratings. The volume gives a broad view of satisfaction without establishing particular calming or sleep effects.
Product Focus66
The single-ingredient approach centers on short-term relaxation and selected attention outcomes. The serving is smaller than amounts used in some small trials, so broader sleep, mood and cognitive expectations remain uncertain.
- Format
Capsule - Container
- 60 Capsule(s)
- Per serving
- $0.15
- Also available
L-Theanine 200 mg$10.06- Customer rating
- 4.7 · 25,106 ratings
Goals
Impact
High effect
Theanine · 100 mg
Theanine may ease tension during stressful tasks, but short-term relaxation does not establish lasting relief from stress. This 100 mg serving provides a focused single-ingredient approach, with mixed findings for sustained mood and anxiety.
How this product is rated for Stress Relief
Ingredient fit72
The active ingredients align with the stress-related nutritional or calming roles described in the supplied information.
Goal fit
The active ingredients align with the stress-related nutritional or calming roles described in the supplied information.
Dose adequacy
The 100 mg serving provides theanine, but comparison amounts do not establish a proven stress-relief dose.
Pathways15
The strongest represented area is neural calming, with effects still limited by the ingredients’ evidence.
Depth
The strongest represented area is neural calming, with effects still limited by the ingredients’ evidence.
Breadth
The serving offers a limited range of stress-related roles, without broad coverage across the evaluated processes.
Evidence77
Theanine may ease tension during stressful tasks, but short-term relaxation does not establish lasting relief from stress.
Evidence strength
Theanine may ease tension during stressful tasks, but short-term relaxation does not establish lasting relief from stress.
Studied preparation
The evaluated preparations match the supplied references, although whole-product and lasting everyday benefits remain unestablished.
Formulation logic100
The evaluated ingredients can contribute independently or have their specified accompanying nutrients represented.
Partner coverage
The evaluated ingredients can contribute independently or have their specified accompanying nutrients represented.
Conflicts
No specified ingredient conflict was found in the supplied combination.
Effective doses
The evaluated ingredients have sufficient amounts for their assigned roles, without establishing a clinically effective dose.
Impact
Moderate effect
Easing tension after mental stress is a possible benefit of L-theanine. This is a narrower effect than an ongoing improvement in mood. The declared serving contains 100 mg, compared with the 200 mg amount associated with the supplied tension-related benefit; that comparison doesn't show the serving cannot help.
How this product is rated for Mood Support
Ingredient fit72
L-theanine may ease stress-related tension; lasting mood improvement is less clear.
Goal fit
L-theanine may ease stress-related tension; lasting mood improvement is less clear.
Dose adequacy
Declared serving amounts include Theanine 100 mg. These are serving amounts, not an assumed daily intake.
Pathways12
Neural calming is relevant to stress-related tension. Biological roles do not guarantee a broader emotional benefit.
Depth
The most represented biological role is neural calming; this describes a mechanism, not a guaranteed change in mood.
Breadth
The represented biological roles are limited at the declared amounts; that does not prove the ingredients cannot help.
Evidence61
L-theanine may ease stress-related tension; lasting mood improvement is less clear.
Evidence strength
L-theanine may ease stress-related tension; lasting mood improvement is less clear.
Studied preparation
The identified forms permit a comparison with the relevant ingredient preparations, without guaranteeing the same benefit for every person.
Formulation logic100
No particular ingredient conflict is identified.
Partner coverage
No missing required partner is identified for the relevant ingredients.
Conflicts
No particular ingredient conflict is identified.
Effective doses
Theanine 100 mg per serving are declared; comparison amounts don't establish a minimum effective dose.
Impact
High effect
L-theanine may support calm attention in the short term. Small trials do not establish sustained cognitive improvement. Its 100 mg per serving is below the 200 mg acute-study comparison amount.
How this product is rated for Brain Health
Ingredient fit72
The relevant ingredients are concentrated on this goal, although the product is also linked to other uses. The declared amounts provide partial support in the saved comparison, with some below its reference amounts.
Goal fit
The relevant ingredients are concentrated on this goal, although the product is also linked to other uses.
Dose adequacy
The declared amounts provide partial support in the saved comparison, with some below its reference amounts.
Pathways14
The mapped emphasis is stress and arousal regulation. Coverage elsewhere is limited.
Depth
The strongest mapped contribution concerns stress and arousal regulation; this describes the ingredient connection, not a demonstrated cognitive outcome.
Breadth
No mapped area reaches the saved threshold for substantial coverage.
Evidence78
The saved findings give Theanine the leading evidence position. Its biological role and the supplied population and preparation limits determine the practical claim.
Evidence strength
Theanine leads the saved evidence comparison, but the supplied scientific limitations still constrain what cognitive benefits can be expected.
Studied preparation
The saved findings accept the preparations used in the comparison; this alone does not prove equivalent cognitive benefits for every declared form.
Formulation logic100
No unmet partner requirement or configured conflict was identified. Amount thresholds describe the saved comparison and do not establish extra benefit from the combination.
Partner coverage
The relevant ingredients have no unmet partner requirement in the supplied findings; this does not establish an added benefit from combining them.
Conflicts
No configured ingredient conflict was identified in the supplied findings.
Effective doses
The counted ingredients pass the saved minimum amount threshold; that threshold is not proof of cognitive effectiveness.
Impact
High effect
Theanine · 100 mg
Theanine may contribute to stress and arousal regulation, but its standalone cognitive findings are limited to selected outcomes and lower-starting-performance participants. This 100 mg serving is below the 200 mg daily amount used in the supplied four-week trial. The smaller amount receives partial exposure recognition without establishing an effective cognitive dose. Relaxation effects alone do not prove improved thinking.
How this product is rated for Cognitive Support
Ingredient fit72
Theanine is the sole counted ingredient. The 100 mg serving is below the supplied 200 mg trial exposure.
Goal fit
Theanine is the sole counted ingredient.
Dose adequacy
The 100 mg serving is below the supplied 200 mg trial exposure.
Pathways15
Stress and arousal regulation is represented weakly, with no pathway reaching the saved coverage threshold.
Depth
Stress and arousal regulation is represented weakly, with no pathway reaching the saved coverage threshold.
Breadth
No pathway reaches the saved coverage threshold.
Evidence81
Theanine has limited, subgroup-specific cognitive findings.
Evidence strength
Theanine has limited, subgroup-specific cognitive findings.
Studied preparation
The counted ingredients receive a saved preparation match; this alone does not demonstrate improved cognition.
Formulation logic100
The counted ingredients meet the saved minimum exposure threshold, with no missing required partner or configured conflict.
Partner coverage
The counted ingredients have no missing required partner; this does not establish an added benefit from combining them.
Conflicts
No configured ingredient conflict was identified; this is not a general safety assessment.
Effective doses
All counted ingredients meet the saved minimum exposure threshold; this does not establish clinically effective cognitive doses.
Impact
High effect
Theanine · 100 mg
Theanine has modest, mixed support for selected acute attention tasks. Its 100 mg per serving amount receives partial amount recognition relative to the configured endpoint, without proving that a larger amount would work better. Caffeine is absent, and standalone findings do not establish broad concentration enhancement or guarantee calmness.
How this product is rated for Mental Focus
Ingredient fit72
Theanine provide the recognized goal connection within the declared formula. Some declared amounts receive partial recognition.
Goal fit
Theanine provide the recognized goal connection within the declared formula.
Dose adequacy
Some recognized ingredients receive partial amount recognition per serving; the comparison endpoints do not establish clinically effective focus doses.
Pathways40
The strongest recognized connection is attention related to theanine; pathway coverage does not itself prove an attention benefit.
Depth
The strongest recognized connection is attention related to theanine; pathway coverage does not itself prove an attention benefit.
Breadth
attention related to theanine provides the substantial pathway coverage. Other biological roles do not establish additional acute effects.
Evidence79
Theanine provides the strongest recognized evidence contribution; supplied preparation, population and duration limits still constrain the focus benefits that can be expected.
Evidence strength
Theanine provides the strongest recognized evidence contribution; supplied preparation, population and duration limits still constrain the focus benefits that can be expected.
Studied preparation
The recognized ingredients meet the preparation check; this does not establish that every nutrient or formulation improves acute attention.
Formulation logic84
Theanine lacks its configured caffeine partner and retains its limited standalone attention role. No configured ingredient conflict was identified in the supplied facts.
Partner coverage
Theanine lacks its configured caffeine partner and retains its limited standalone attention role.
Conflicts
No configured ingredient conflict was identified in the supplied facts.
Effective doses
The recognized ingredients meet the amount threshold; this comparison convention does not establish a proven effective focus dose.
Impact
High effect
Theanine · 100 mg
L-theanine may help relaxation and some aspects of sleep quality. The serving provides 100 mg, below the 200 mg daily amount used in the supplied small four-week trial. Its contribution is therefore modest in the saved amount findings, and the trial does not establish an immediate sedative effect. This is a narrow calming approach rather than direct support for sleep timing.
How this product is rated for Sleep Support
Ingredient fit72
Theanine gives this single-ingredient formula a relevant sleep connection. Its amount provides a partial contribution in the saved findings.
Goal fit
The only active connects to sleep, although the product is linked to several other goals.
Dose adequacy
The 100 mg serving is below the 200 mg daily amount highlighted in the supplied trial.
Pathways17
Theanine contributes mainly to calming, with a smaller stress-related connection. Neither reaches substantial coverage in the saved findings.
Depth
Calming is the strongest aspect, but its saved coverage remains modest at this amount.
Breadth
No aspect reaches the saved substantial-coverage criterion; this does not mean theanine is ineffective.
Evidence86
A small repeated-use trial supports some sleep-quality findings for theanine. The declared L-theanine matches the recognized preparation.
Evidence strength
Theanine has limited supportive sleep evidence, based on a small trial and selected outcomes.
Studied preparation
The declared L-theanine is recognized as a studied preparation.
Formulation logic100
Theanine does not require a partner in the saved findings, and no assessed conflict was identified.
Partner coverage
Theanine can contribute without another ingredient.
Conflicts
No assessed conflict was identified.
Effective doses
Theanine meets the saved amount criterion, although that criterion does not establish a proven effective sleep dose.
Impact
High effect
Theanine · 100 mg
Theanine has limited evidence for fewer sustained-attention errors in a small trial; it does not guarantee calmness or improved work output.
How this product is rated for Productivity Boost
Ingredient fit72
The included amounts only partly match the supplied comparison range; this does not define a proven effective dose.
Goal fit
The main ingredients align with the supplied productivity comparison, although their roles extend beyond work performance.
Dose adequacy
The included amounts only partly match the supplied comparison range; this does not define a proven effective dose.
Pathways40
The strongest saved connection concerns attention associated with theanine; this does not establish improved work performance.
Depth
The strongest saved connection concerns attention associated with theanine; this does not establish improved work performance.
Breadth
Coverage centers on one mechanism, leaving the other productivity-related routes unrepresented.
Evidence74
Theanine’s attention findings come from a small trial and do not measure occupational productivity.
Evidence strength
Theanine’s attention findings come from a small trial and do not measure occupational productivity.
Studied preparation
The saved findings recognize the included preparations; this does not establish superior delivery or unrestricted work benefits.
Formulation logic100
No conflict was identified by the supplied checks. All retained ingredients pass the minimum amount comparison, which is not proof of an effective productivity dose.
Partner coverage
No required ingredient partner is missing in the supplied findings; this does not demonstrate added benefit from combining ingredients.
Conflicts
No conflict was identified by the supplied checks.
Effective doses
All retained ingredients pass the minimum amount comparison, which is not proof of an effective productivity dose.
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
L-Theanine | 100 mg |
Theanine · 100 mg OverallScore96
Each serving provides 100 mg of L-theanine from a branded source. At the whole-product price, that works out to about $0.16 per 100 mg of L-theanine.
How this ingredient is rated
Active Ingredient Quality & Bioavailability100
The saved information identifies L-theanine from a branded source.
Isomer Specificity (L-Theanine)
The ingredient is identified as L-theanine.
Branded Forms & Purity Standards
A branded L-theanine source is identified in the saved information.
Dose, Safety & Label Transparency100
The amount is individually disclosed as 100 mg of L-theanine per serving.
Theanine Dosage Efficacy
Each serving provides 100 mg of L-theanine.
Label Transparency & Blends
The saved information individually discloses 100 mg of L-theanine per serving.
Value80
At the whole-product price, that works out to about $0.16 per 100 mg of L-theanine.
Price per 100mg L-Theanine
At the whole-product price, that works out to about $0.16 per 100 mg of L-theanine.
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.