$49.99 $0.41 per serving
Product analysis
L-Theanine 200 mg offers good value for a calming supplement that may ease short-term tension and support some aspects of sleep quality.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality100
The ingredient is clearly identified as L-theanine. That specifies the form being supplied rather than leaving the type of theanine uncertain.
Ingredient Transparency100
Ingredient amounts and forms are disclosed. That makes it easier to compare what each serving contains.
Value For Money80
The cost is competitive for the amount of L-theanine provided. That supports its appeal as a straightforward single-ingredient option.
Customer Satisfaction71
Customer feedback is strongly positive. The relatively small review pool limits how representative that feedback may be.
Product Focus76
The clearest fit is relaxation, with possible benefits for some sleep and attention measures. The serving matches amounts used in small trials, but lasting mood improvements or better work output are not established.
- Format
Capsule - Container
- 120 Capsule(s)
- Per serving
- $0.41
- Customer rating
- 4.7 · 73 ratings
Goals
Impact
High effect
Theanine · 200 mg
Theanine may reduce tension and help relaxation during stressful tasks. The 200 mg serving matches the supplied preferred comparison amount. Longer-term mood and anxiety findings are mixed, so short-term relaxation does not establish durable stress relief.
How this product is rated for Stress Relief
Ingredient fit92
The declared actives are focused on stress-related roles.
Goal fit
The declared actives are focused on stress-related roles.
Dose adequacy
The declared serving amounts determine the contribution; matching a comparison amount does not establish the same benefit for everyone.
Pathways71
The strongest represented aspect is neural calming.
Depth
The strongest represented aspect is neural calming.
Breadth
The main represented aspects are neural calming, sleep recovery.
Evidence77
Theanine provides the main evidence contribution, within its specific preparation and population limitations.
Evidence strength
Theanine provides the main evidence contribution, within its specific preparation and population limitations.
Studied preparation
The counted preparations match the supplied comparisons; this does not establish benefit outside the studied settings.
Formulation logic100
The counted ingredients have their specified partners or do not require one in this comparison.
Partner coverage
The counted ingredients have their specified partners or do not require one in this comparison.
Conflicts
No specified ingredient conflict was identified in the supplied calculation.
Effective doses
The counted ingredients provide meaningful amounts under the supplied comparison, without establishing a universal effective dose.
Impact
High effect
L-theanine may support calm attention in the short term. Small trials do not establish sustained cognitive improvement. The 200 mg per serving matches the supplied acute-study comparison amount.
How this product is rated for Brain Health
Ingredient fit92
The relevant ingredients are concentrated on this goal, although the product is also linked to other uses. The amounts receive full recognition in the saved comparison; that does not establish an optimal personal dose.
Goal fit
The relevant ingredients are concentrated on this goal, although the product is also linked to other uses.
Dose adequacy
The amounts receive full recognition in the saved comparison; that does not establish an optimal personal dose.
Pathways48
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
Substantial coverage is concentrated in one mapped area rather than spread across several aspects of brain function.
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 · 200 mg
Theanine has modest, mixed support for selected acute attention tasks. At 200 mg per serving it matches an amount tested for recognition reaction time, but other tasks and studies did not consistently improve. Caffeine is absent, so this is a standalone theanine contribution; a calming or anti-jitter effect is not guaranteed.
How this product is rated for Mental Focus
Ingredient fit92
Theanine provide the recognized goal connection within the declared formula. The recognized amounts reach the configured endpoints.
Goal fit
Theanine provide the recognized goal connection within the declared formula.
Dose adequacy
The recognized amounts reach their configured endpoints per serving; this does not establish that larger amounts improve focus.
Pathways60
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
Highest effect
Theanine · 200 mg
Theanine may help relaxation and some aspects of reported sleep quality. The 200 mg per serving matches the amount used in a small four-week trial, which found improvements in some sleep measures. This supports a possible calming contribution, with limited certainty from the small study and no established immediate sedative effect.
How this product is rated for Sleep Support
Ingredient fit92
Theanine is directly relevant to calming, although the product is linked to several goals.
Goal fit
Theanine is the only credited active; the product has several stated purposes.
Dose adequacy
Theanine's amount meets the saved reference.
Pathways73
Theanine contributes mainly to calming, with a stress-related route also represented.
Depth
Calming is the strongest finding.
Breadth
Calming and stress-related support are represented; sleep timing is not.
Evidence86
Theanine provides the main evidence, drawn from limited sleep studies.
Evidence strength
Theanine provides the main evidence, drawn from limited sleep studies.
Studied preparation
The supplied L-theanine form matches the recognized preparation.
Formulation logic100
Theanine does not require a partner. No evaluated sleep conflicts were found.
Partner coverage
Theanine does not require a partner.
Conflicts
No evaluated activating-ingredient conflict was found in the supplied facts.
Effective doses
All ingredients counted in this rule pass the saved amount threshold; that threshold is not proof of clinical benefit.
Impact
Highest effect
Theanine · 200 mg
L-theanine has limited standalone relevance to verbal fluency and executive tasks. In the supplied small four-week trial, the comparison with placebo favored only a subgroup with lower starting performance, rather than showing uniform improvement. The 200 mg per serving matches the daily amount studied, but does not establish repeated use or the same personal response.
How this product is rated for Cognitive Support
Ingredient fit92
Theanine contributes to the saved ingredient-fit finding. The retained amounts reach their reference comparisons.
Goal fit
The retained ingredients and the product’s other active ingredients and linked uses determine how specifically the formula addresses cognition.
Dose adequacy
The retained amounts reach the saved reference comparisons; those comparisons do not establish effective doses for broad cognitive enhancement.
Pathways51
The strongest recorded connection is stress and arousal regulation. Coverage is concentrated in one tracked pathway.
Depth
The strongest recorded connection is stress and arousal regulation; this mapping does not establish an improvement in cognitive performance.
Breadth
Only one tracked pathway reaches the coverage threshold, leaving the recorded coverage narrow.
Evidence81
Theanine leads the saved evidence finding. The supplied limitations determine whether this concerns narrow tasks, selected populations or normal nutritional roles.
Evidence strength
Theanine leads the saved evidence finding; the supplied task, population and preparation limitations still restrict the cognitive benefits that can be described.
Studied preparation
The saved preparation comparison recognizes the retained forms; it does not establish a clinical trial of this complete product.
Formulation logic100
No required partner was missing and no configured conflict was found. The retained ingredients meet the minimum amount criterion.
Partner coverage
No missing required partner was identified for the retained ingredients. This does not establish extra benefit from combining them.
Conflicts
No configured ingredient conflict was identified; this does not establish overall safety or individual suitability.
Effective doses
All retained ingredients meet the minimum amount criterion; this is not a proven effective cognitive dose.
Impact
Moderate effect
L-theanine may help reduce tension and anxiety after demanding mental tasks. That makes its possible benefit most relevant when stress is affecting how you feel. Calming that tension is different from treating depression, and a lasting improvement in everyday mood is less clear.
How this product is rated for Mood Support
Ingredient fit92
Theanine give the main mood-related ingredient connections.
Goal fit
Theanine connect with mood-related functions.
Dose adequacy
Theanine 200 mg.
Pathways43
The ingredients relate most directly to neural calming. This describes their roles, not a promise of a particular emotional effect.
Depth
The closest ingredient connection is neural calming.
Breadth
Different biological roles do not guarantee broader or stronger mood benefits.
Evidence61
The ingredient has a possible mood connection, with limits on how broadly its benefits apply.
Evidence strength
The ingredient has a possible mood connection, with limits on how broadly its benefits apply.
Studied preparation
The declared ingredient identity is usable, but this alone does not ensure a mood benefit.
Formulation logic100
No required partner is missing and no particular ingredient conflict is identified. Serving amounts and preparation identity still matter for interpreting individual effects.
Partner coverage
No missing required ingredient partner is identified.
Conflicts
No particular ingredient conflict is identified in this combination.
Effective doses
Declared serving amounts can be compared with ingredient-specific amounts; they do not determine a daily regimen.
Impact
High effect
Theanine · 200 mg
Theanine may support attention, with limited standalone evidence from a small trial; a larger amount does not establish a larger benefit or guaranteed calmness. Attention-test changes do not establish improved work output.
How this product is rated for Productivity Boost
Ingredient fit92
Theanine connects the formula to attention, while any undisclosed botanical amounts limit serving comparisons.
Goal fit
The declared ingredients are concentrated around the assessed goal, though use across other goals broadens the product’s focus.
Dose adequacy
The declared amount reaches the saved comparison range; that does not establish an effective productivity dose.
Pathways60
Attention is the main represented route; broader cognitive coverage remains limited.
Depth
Attention is the strongest represented route.
Breadth
Only one assessed route reaches meaningful coverage, so the findings do not show broad support across different aspects of productivity.
Evidence74
Theanine has limited attention-test evidence; the saved recognition of other ingredients does not establish broad work benefits.
Evidence strength
Theanine supplies limited standalone attention evidence from a small trial.
Studied preparation
The saved finding recognizes the eligible declarations as matching its preparation criteria; this does not establish extra benefit from their forms.
Formulation logic100
No configured conflict or missing partner was found, and the counted ingredients meet the saved minimum amount threshold.
Partner coverage
No missing ingredient partner limits the saved finding; this does not demonstrate an added benefit from combining ingredients.
Conflicts
No configured ingredient conflict was identified in the supplied facts.
Effective doses
The counted ingredients reach the saved minimum amount threshold, which is a comparison criterion rather than proof of benefit.
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
Suntheanine (L-Theanine) | 200 mg |
Theanine (L-Theanine) · 200 mg OverallScore96
Each serving clearly provides 200 mg of branded L-theanine. The whole-product price works out to about $0.21 per 100 mg of L-theanine, which is moderate in this comparison.
How this ingredient is rated
Active Ingredient Quality & Bioavailability100
The ingredient is specified as L-theanine and a branded form is recorded in the supplied facts.
Isomer Specificity (L-Theanine)
The ingredient is identified as L-theanine.
Branded Forms & Purity Standards
A branded L-theanine source is recorded, but its name is not supplied in the saved facts.
Dose, Safety & Label Transparency100
The serving specifies 200 mg of L-theanine, so the ingredient amount is clear.
Theanine Dosage Efficacy
The 200 mg per serving is an amount considered suited to supporting relaxation or focus.
Label Transparency & Blends
The 200 mg amount of L-theanine is individually disclosed per serving.
Value80
The whole-product price works out to about $0.21 per 100 mg of L-theanine, which is moderate in this comparison.
Price per 100mg L-Theanine
The whole-product price works out to about $0.21 per 100 mg of L-theanine, which is moderate in this comparison.
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.