$13.90 $0.15 per serving
Product analysis
Chewable L-Theanine 100 mg may help with short-term relaxation and calmer attention, with modest and mixed evidence for sleep and focus. The ingredient preparations are not fully described, limiting comparisons with more clearly specified formulas.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality20
The ingredient preparations are not fully disclosed. That leaves the exact characteristics of the theanine, inositol and taurine difficult to compare.
Ingredient Transparency63
All declared ingredient amounts are listed. Their preparation details are missing, so quantity is clearer than ingredient characteristics.
Value For Money63
The theanine offers favorable value for the amount supplied. Value for inositol and taurine remains uncertain.
Customer Satisfaction87
Ratings are favorable across thousands of reviews. That provides substantial buyer feedback without proving relaxation or sleep benefits.
Product Focus59
Theanine provides the main connection to relaxation and calmer attention. The serving is below some of the amounts used for stress and cognition, while taurine and inositol add little clearly supported sleep benefit.
- Format
Tablet - Container
- 90 Tablet(s)
- Per serving
- $0.15
- Customer rating
- 4.7 · 3,726 ratings
Goals
Impact
High effect
Theanine · 100 mg
Theanine may help short-term relaxation and tension, but acute relaxation does not establish durable stress relief. The 100 mg selected serving provides a partial contribution against the supplied amount reference. Its connection is mainly with calming and, to a lesser extent, sleep recovery. The other ingredients do not add a meaningful supported emotional stress contribution at their supplied amounts.
How this product is rated for Stress Relief
Ingredient fit72
Theanine supplies the meaningful goal-related contribution.
Goal fit
Theanine supplies the meaningful goal-related contribution.
Dose adequacy
The 100 mg serving provides partial amount support.
Pathways15
Calming and sleep recovery receive limited contributions.
Depth
Calming is the strongest aspect, with a smaller sleep-recovery contribution.
Breadth
Neither aspect reaches the saved coverage threshold.
Evidence77
Theanine has direct tension findings, with mixed sustained mood and anxiety outcomes.
Evidence strength
Theanine has direct tension findings, with mixed sustained mood and anxiety outcomes.
Studied preparation
The contributing ingredients with sufficient amounts meet the saved studied-preparation comparison.
Formulation logic100
The contributing ingredients work independently or have their relevant partners, with no flagged formulation conflict.
Partner coverage
The contributing ingredients work independently or have their relevant partners.
Conflicts
No configured ingredient conflict is identified in the supplied facts.
Effective doses
All credited ingredients meet the minimum amount threshold for a contribution.
Impact
Moderate effect
Theanine · 100 mg
Theanine at 100 mg may help sustained attention, with limited evidence from attention tasks. That offers a focused contribution to staying on task, without implying a guaranteed calming effect or improved work output.
How this product is rated for Productivity Boost
Ingredient fit51
Relevant ingredients sit within a broader formula with other purposes. The assessed amounts provide a partial match to the saved benchmarks.
Goal fit
Relevant ingredients sit within a broader formula with other purposes.
Dose adequacy
The assessed amounts provide a partial match to the saved benchmarks.
Pathways40
The main recorded contribution is attention support from theanine. The saved findings cover one main mechanism, so the support is relatively focused.
Depth
The main recorded contribution is attention support from theanine.
Breadth
The saved findings cover one main mechanism, so the support is relatively focused.
Evidence74
Theanine provides the strongest evidence contribution among the assessed ingredients. The assessed ingredients with qualifying amounts are recorded as matching studied preparations.
Evidence strength
Theanine provides the strongest evidence contribution among the assessed ingredients.
Studied preparation
The assessed ingredients with qualifying amounts are recorded as matching studied preparations.
Formulation logic100
The assessed ingredients can contribute independently or have the partners required by the saved assessment. No ingredient conflict was flagged by the saved checks.
Partner coverage
The assessed ingredients can contribute independently or have the partners required by the saved assessment.
Conflicts
No ingredient conflict was flagged by the saved checks.
Effective doses
All ingredients counted toward the goal meet the saved minimum amount threshold.
Impact
Moderate effect
Theanine · 100 mg
L-theanine may help you unwind and modestly improve sleep quality, so it is the main reason this chewable could relate to better sleep. Its role is more about settling down than changing sleep timing.
The formula also contains a small amount of taurine, which is unlikely to add much to sleep support at that level. Inositol is listed too, but its contribution to sleep is not established in the supplied facts.
How this product is rated for Sleep Support
Ingredient fit58
L-theanine is the clearest sleep-related ingredient, with a possible role in relaxation and sleep quality. Taurine is present, but the disclosed amount is too small to add much.
Goal fit
L-theanine is directly relevant to sleep; no sleep role is established here for the listed inositol.
Dose adequacy
The serving provides 100 mg L-theanine; taurine is only 100 mg, too little to add a clear sleep contribution here.
Pathways17
The formula centers on calming, with a smaller stress-regulation contribution. It does not add a distinct sleep-timing route.
Depth
The strongest connection is calming, rather than sleep timing or onset.
Breadth
The formula adds some stress-related support, but no separate sleep-timing or melatonin role.
Evidence86
Theanine has the clearest sleep-related role here, though the possible benefit is modest and not a guaranteed sedative effect.
Evidence strength
Theanine has the clearest supplied sleep support among these ingredients, although its likely effect is modest.
Studied preparation
The active is identified as L-theanine, but that does not establish a strong or immediate sleep effect.
Formulation logic100
L-theanine can contribute on its own; the other listed ingredients do not add a clear sleep-specific role.
Partner coverage
L-theanine can stand alone for its possible calming role; it does not depend on a second active here.
Conflicts
No caffeine or other identified bedtime stimulant appears among the listed actives.
Effective doses
The theanine amount contributes to sleep support; taurine is too low to add much, and inositol has no established sleep role.
Taurine Not classified
No linked studies yet.
Impact
Moderate effect
L-theanine at 100 mg may help with calm attention. The amount is below the 200 mg endpoint used in the supplied comparison, and the evidence concerns limited attention and calm-focus outcomes.
How this product is rated for Brain Health
Ingredient fit51
The relevant ingredients fit the goal, with the declared amounts and broader formula focus shaping their contribution.
Goal fit
Relevant ingredients are present, but the formula also targets several other purposes.
Dose adequacy
The assessed amounts provide partial support within the supplied comparison range.
Pathways14
The main assessed contribution is concentrated in stress and arousal regulation.
Depth
The strongest saved finding concerns stress and arousal regulation, with partial coverage.
Breadth
The saved findings remain narrow and do not show strong coverage across several brain-health processes.
Evidence78
L-theanine leads the evidence finding, which concerns limited calm-attention outcomes. The saved assessment recognizes the preparation for the ingredients included in this finding.
Evidence strength
L-theanine leads the evidence finding, which concerns limited calm-attention outcomes.
Studied preparation
The saved assessment recognizes the preparation for the ingredients included in this finding.
Formulation logic100
The assessed ingredients need no additional partner, and no configured conflicts were found.
Partner coverage
The assessed ingredients can contribute without an additional required partner.
Conflicts
No configured ingredient conflict was identified in the supplied assessment.
Effective doses
The ingredients included in this saved finding meet its amount threshold.
Impact
Moderate effect
Theanine · 100 mg
Theanine at 100 mg may support calmer attention, with mixed standalone findings for attention tasks. It provides a partial amount in the supplied comparison, and the saved findings retain a limitation for its missing partner.
How this product is rated for Mental Focus
Ingredient fit51
Attention-related ingredients sit alongside broader nutritional or other uses. The counted amounts provide partial support, with smaller or unresolved amounts limiting some contributions.
Goal fit
Attention-related ingredients sit alongside broader nutritional or other uses.
Dose adequacy
The counted amounts provide partial support, with smaller or unresolved amounts limiting some contributions.
Pathways40
The clearest support involves calm attention, with meaningful coverage in the saved findings. One attention mechanism reaches meaningful coverage, leaving support relatively focused.
Depth
The clearest support involves calm attention, with meaningful coverage in the saved findings.
Breadth
One attention mechanism reaches meaningful coverage, leaving support relatively focused.
Evidence79
Theanine supplies the strongest relevant evidence at a counted amount, with benefits limited to the particular contexts and outcomes assessed. The preparations counted here match those recognized in the supplied evidence.
Evidence strength
Theanine supplies the strongest relevant evidence at a counted amount, with benefits limited to the particular contexts and outcomes assessed.
Studied preparation
The preparations counted here match those recognized in the supplied evidence.
Formulation logic84
Theanine lacks its configured partner, so the saved findings retain only its independent contribution. No configured ingredient conflict was identified. All ingredients counted here reach a meaningful amount in the saved comparison.
Partner coverage
Theanine lacks its configured partner, so the saved findings retain only its independent contribution.
Conflicts
No configured ingredient conflict was identified.
Effective doses
All ingredients counted here reach a meaningful amount in the saved comparison.
Impact
Moderate effect
Theanine may help ease tension linked to stress, but this serving provides 100 mg rather than the 200 mg amount associated with that effect. That comparison doesn't make 100 mg ineffective; it means the same benefit can't be assumed at this amount. A lasting improvement in low mood is also unclear.
How this product is rated for Mood Support
Ingredient fit72
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 100 mg per serving.
Pathways12
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 ingredient connection is narrow; broader emotional benefits cannot be inferred from the named mechanism.
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 100 mg per serving.
Impact
Moderate effect
Theanine · 100 mg
L-theanine has limited evidence relating to verbal fluency and executive function, alongside its connection with stress regulation. The 100 mg serving is below the 200 mg daily amount used in the supplied cognitive trial, whose benefits were confined to a subgroup.
How this product is rated for Cognitive Support
Ingredient fit51
Cognitive support is one part of a broader formula, with other ingredients serving different purposes. The amounts give a moderate match to the saved comparison levels.
Goal fit
Cognitive support is one part of a broader formula, with other ingredients serving different purposes.
Dose adequacy
The amounts give a moderate match to the saved comparison levels.
Pathways15
The clearest connection is stress and arousal regulation, with limited coverage. The saved findings do not reach meaningful coverage across multiple direct cognitive mechanisms.
Depth
The clearest connection is stress and arousal regulation, with limited coverage.
Breadth
The saved findings do not reach meaningful coverage across multiple direct cognitive mechanisms.
Evidence81
Theanine provides the strongest evidence connection at an assessed amount, with a limited scope for cognitive benefits. The ingredients counted at relevant amounts match the preparations accepted in the saved findings.
Evidence strength
Theanine provides the strongest evidence connection at an assessed amount, with a limited scope for cognitive benefits.
Studied preparation
The ingredients counted at relevant amounts match the preparations accepted in the saved findings.
Formulation logic100
The assessed ingredients can work alone or have their relevant partner present. No ingredient conflict was identified in the supplied checks. All ingredients counted in this check meet its minimum amount threshold.
Partner coverage
The assessed ingredients can work alone or have their relevant partner present.
Conflicts
No ingredient conflict was identified in the supplied checks.
Effective doses
All ingredients counted in this check meet its minimum amount threshold.
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
L-Theanine | 100 mg | |
Inositol | 100 mg | |
Taurine | 100 mg |
Theanine · 100 mg OverallScore88
Each serving provides 100 mg of L-theanine. The cost works out to about $0.15 per 100 mg of L-theanine, based on the whole-product price.
How this ingredient is rated
Active Ingredient Quality & Bioavailability80
The ingredient is identified as L-theanine; the saved facts provide no evidence of a branded source or an additional purity claim.
Isomer Specificity (L-Theanine)
The ingredient is specifically identified as L-theanine.
Branded Forms & Purity Standards
The saved facts provide no evidence of a branded source or an additional purity claim.
Dose, Safety & Label Transparency100
Each serving provides 100 mg of L-theanine, a form often used for relaxation and focus. The amount and source are individually disclosed.
Theanine Dosage Efficacy
Each serving provides 100 mg of L-theanine, a form often used for relaxation and focus.
Label Transparency & Blends
The label information identifies the source and lists 100 mg of L-theanine per serving.
Value80
The whole-product cost works out to about $0.15 per 100 mg of L-theanine, based on the whole-product price.
Price per 100mg L-Theanine
The whole-product cost works out to about $0.15 per 100 mg of L-theanine, based on the whole-product price.
Taurine · 100 mg OverallScore52
A serving provides a small 100 mg of taurine. At the whole-product price, that works out to about $1.54 per gram of taurine.
How this ingredient is rated
Active Ingredient Quality & Bioavailability66
A free-form or L-taurine designation is recorded; source and formulation details are limited to the saved facts.
Chemical Form and Purity
L-taurine or free-form wording is recorded, but the saved facts do not establish a USP or pharmaceutical grade.
Sourcing and Branded Ingredients
The saved facts do not establish a branded taurine source or an origin claim.
Formulation Cleanliness
The evaluation records a standard flow agent among the other ingredients.
Dose, Safety & Label Transparency54
The serving amount is specified as 100 mg of taurine.
Taurine Dosage Potency
A serving supplies a small 100 mg of taurine.
Dose Disclosure
The amount of taurine is stated per serving: 100 mg.
Quality Assurance and Testing
A testing or GMP claim is recorded, but no specific independent certification seal is established.
Value20
The whole-product cost per gram of taurine is relatively high in the evaluation.
Price per Gram of Taurine
At the whole-product price, the cost is about $1.54 per gram of taurine.
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.