Smart Caffeine with L-Theanine
Goals
$18.95 $0.31 per serving
Product analysis
Smart Caffeine with L-Theanine supports short-term alertness, while theanine may ease tension during demanding tasks. Caffeine can interfere with sleep, which limits its appeal for winding down.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality29
The caffeine source is identified, but its comparative form quality remains uncertain. The theanine form is not clearly specified, limiting a complete comparison.
Ingredient Transparency81
Both ingredient amounts are clearly listed, making their balance straightforward to compare. The caffeine source is named, while the exact theanine form is less clearly specified.
Value For Money80
The serving cost compares favorably for both caffeine and theanine. The short ingredient list makes it easier to judge what the price covers.
Customer Satisfaction73
Customer feedback is generally positive across several hundred ratings. It offers a useful view of satisfaction without establishing particular focus or calming effects.
Product Focus63
The clearest purpose is short-term alertness and attention, with possible tension relief from theanine. The combination does not guarantee extra benefits or remove caffeine's potential to disrupt sleep.
- Format
Capsule - Container
- 60 Capsule(s)
- Per serving
- $0.31
- Customer rating
- 4.4 · 819 ratings
Goals
Impact
High effect
Theanine · 200 mgCaffeine · 100 mg
Caffeine can improve short-term alertness and attention, with effects influenced by timing, tolerance and sleep. Theanine has limited evidence for fewer sustained-attention errors in a small trial; it does not guarantee calmness or improved work output. Their combination has not consistently improved attention beyond either alone.
How this product is rated for Productivity Boost
Ingredient fit81
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.
Pathways80
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
Two mechanisms reach the supplied coverage threshold, while other productivity-related routes remain unrepresented.
Evidence76
Caffeine has direct short-term attention evidence, without proof of sustained occupational productivity.
Evidence strength
Caffeine has direct short-term attention evidence, without proof of sustained 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.
Impact
High effect
Caffeine · 100 mg
Caffeine supports acute alertness and reduced sleepiness, with 100 mg explicitly declared per serving. Theanine has some outcome-specific combination findings, but these do not establish standalone fatigue relief or a universal anti-jitter effect. Together they primarily relate to alertness, without establishing sustained cellular energy or treatment of chronic fatigue.
How this product is rated for Energy
Ingredient fit79
The relevant included ingredients are Caffeine, Theanine. Their amounts receive different levels of support in the supplied findings.
Goal fit
The relevant ingredients dominate the assessed formulation, although the product is also linked to other goals.
Dose adequacy
The included amounts provide partial support against the saved amount references, without defining proven fatigue-treatment doses.
Pathways49
The supplied findings concentrate on alertness. They do not establish broad coverage across the other configured energy pathways.
Depth
The best-represented configured pathway is alertness.
Breadth
Only alertness reaches the saved breadth requirement; other contributions remain below it.
Evidence96
The strongest included evidence contribution comes from Caffeine. Theanine does not meet the studied-preparation check.
Evidence strength
Caffeine provides the strongest included evidence contribution, subject to its specific population and deficiency limitations.
Studied preparation
The included preparations mostly match the saved study check; Theanine does not.
Formulation logic100
The counted ingredients meet the minimum amount requirement, without a missing required partner or matched conflict.
Partner coverage
No included ingredient lacks a required partner in the supplied findings; this does not imply extra benefit from combining ingredients.
Conflicts
No configured ingredient conflict was matched in the supplied facts.
Effective doses
All counted ingredients meet the saved minimum amount requirement, which is distinct from a proven fatigue-treatment dose.
Theanine Not classified
No linked studies yet.
Impact
High effect
Theanine · 200 mgCaffeine · 100 mg
Caffeine supports acute alertness and vigilance, while theanine has modest, mixed support for selected attention tasks. Both declared amounts reach their configured endpoints per serving. The combination meets the saved partner check, but that does not establish automatic synergy or protection from caffeine-related jitteriness. Timing, tolerance and individual response can affect the practical result.
How this product is rated for Mental Focus
Ingredient fit91
Caffeine and Theanine provide the recognized goal connection within the declared formula. The recognized amounts reach the configured endpoints.
Goal fit
Caffeine and 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.
Pathways80
The strongest recognized connection is alertness from caffeine; pathway coverage does not itself prove an attention benefit.
Depth
The strongest recognized connection is alertness from caffeine; pathway coverage does not itself prove an attention benefit.
Breadth
alertness from caffeine, attention related to theanine provides the substantial pathway coverage. Other biological roles do not establish additional acute effects.
Evidence79
Caffeine provides the strongest recognized evidence contribution; supplied preparation, population and duration limits still constrain the focus benefits that can be expected.
Evidence strength
Caffeine 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 logic100
No recognized ingredient lacks a required partner; that does not establish added benefit from combining ingredients. No configured ingredient conflict was identified in the supplied facts.
Partner coverage
No recognized ingredient lacks a required partner; that does not establish added benefit from combining ingredients.
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
Caffeine supports short-term alertness and attention, while L-theanine may support calm attention. The 200 mg L-theanine per serving matches the supplied acute-study comparison amount. Their combination does not establish an added benefit beyond their individual roles, and sustained cognitive improvement remains uncertain.
How this product is rated for Brain Health
Ingredient fit91
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
Highest effect
Theanine · 200 mg
Caffeine supports alertness and sustained attention, while theanine may contribute to stress and arousal regulation. Caffeine does not consistently improve memory or learning, and habitual use can produce tolerance. The 200 mg theanine serving matches a small trial whose cognitive result was limited to participants with lower starting performance; the 100 mg caffeine serving is below the supplied 150 mg comparison. Their combination does not establish an extra cognitive benefit.
How this product is rated for Cognitive Support
Ingredient fit89
Caffeine and theanine directly provide the relevant connections. Theanine reaches its saved comparison, while caffeine receives partial exposure recognition.
Goal fit
Caffeine and theanine directly provide the relevant connections.
Dose adequacy
Theanine reaches its saved comparison, while caffeine receives partial exposure recognition.
Pathways71
Stress and arousal regulation and alertness are both represented.
Depth
Stress and arousal regulation and alertness are both represented.
Breadth
Two pathways reach the saved coverage threshold, leaving other cognitive routes unrepresented.
Evidence81
Both ingredients receive saved preparation matches; their findings do not establish synergy.
Evidence strength
Both ingredients receive saved preparation matches; their findings do not establish synergy.
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
Moderate effect
Caffeine · 100 mg
Caffeine may briefly increase the energy your body uses at rest. The declared 100 mg serving gives a concrete basis for that modest, short-lived effect. A temporary increase in calorie burning doesn't tell you whether the effect will persist with regular use or lead to lasting fat loss, so expectations should stay focused on an acute effect.
How this product is rated for Metabolism Support
Ingredient fit57
Caffeine can briefly raise resting energy use.
Goal fit
Caffeine can briefly raise resting energy use.
Dose adequacy
The serving provides Caffeine 100 mg. These amounts alone don't predict an increase in calorie burning.
Pathways16
The relevant connection is stimulation of energy use, with the size and persistence of any effect uncertain.
Depth
The relevant connection is stimulation of energy use, with the size and persistence of any effect uncertain.
Breadth
The connection is limited to stimulation of energy use, rather than several distinct effects on calorie burning.
Evidence66
Caffeine can briefly raise resting energy use.
Evidence strength
Caffeine can briefly raise resting energy use.
Studied preparation
The declared ingredient forms match the relevant preparation descriptions; this alone does not predict the size of a benefit.
Formulation logic100
No particular ingredient conflict or missing required partner is identified.
Partner coverage
No required companion ingredient is missing for the ingredient roles described here.
Conflicts
No particular ingredient conflict is identified.
Effective doses
Declared amounts allow comparison, but a dose reference is not a minimum effective amount for increasing calorie burning.
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
L-Theanine | 200 mg | |
Caffeine (Green Coffee) | 100 mg |
Theanine · 200 mg OverallScore88
Each serving provides 200 mg of L-theanine in a clearly disclosed amount. 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 & Bioavailability80
The form is identified as L-theanine; the saved details do not identify a branded source or a purity claim.
Isomer Specificity (L-Theanine)
The ingredient is identified as L-theanine.
Branded Forms & Purity Standards
The saved details do not identify a branded source or a purity claim.
Dose, Safety & Label Transparency100
The amount is individually disclosed as 200 mg of L-theanine per serving.
Theanine Dosage Efficacy
Each serving provides 200 mg of L-theanine.
Label Transparency & Blends
The saved information individually discloses 200 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.
Caffeine (Green Coffee) · 100 mg OverallScore72
Each serving contains 100 mg of caffeine, an amount the evaluation considers moderate. A whole-product serving costs about $0.32, on the lower side of the compared prices.
How this ingredient is rated
Active Ingredient Quality & Bioavailability40
Caffeine is identified, but the specific form is unknown in the saved facts; no particular release profile can be inferred.
Advanced Bioavailability and Release Profiles
Caffeine is identified, but the specific form is unknown in the saved facts; no particular release profile can be inferred.
Dose, Safety & Label Transparency100
The stated amount is 100 mg per serving, an amount the evaluation considers moderate. The evaluated label lists no other stimulants.
Caffeine Dose Transparency
The caffeine amount is stated as 100 mg per serving.
Dosage Efficacy and Safety Margin
The serving has 100 mg of caffeine, an amount the evaluation considers moderate.
Secondary Stimulant Disclosure and Risk
The evaluated label lists no other stimulants.
Value80
A whole-product serving costs about $0.32, on the lower side of the compared prices.
Price Per Serving vs. Collection Median
A whole-product serving costs about $0.32, on the lower side of the compared prices.
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.
- Cognitive and mood improvements of caffeine in habitual consumers and habitual non-consumers of caffeine.
- Caffeine-containing energy drink improves physical performance of elite rugby players during a simulated match.
- Differential cognitive effects of energy drink ingredients: caffeine, taurine, and glucose.
- Does Single or Combined Caffeine and Taurine Supplementation Improve Athletic and Cognitive Performance without Affecting Fatigue Level in Elite Boxers? A Double-Blind, Placebo-Controlled Study.
- Trait Energy and Fatigue Modify the Effects of Caffeine on Mood, Cognitive and Fine-Motor Task Performance: A Post-Hoc Study.
- Effect of caffeine ingestion on cycling performance: a systematic review and meta-analysis.
- Effects of Caffeine Intake on Endurance Running Performance and Time to Exhaustion: A Systematic Review and Meta-Analysis.
- Acute Effects of Caffeine Supplementation on Movement Velocity in Resistance Exercise: A Systematic Review and Meta-analysis.
- Sex Differences in the Ergogenic Response of Acute Caffeine Intake on Muscular Strength, Power and Endurance Performance in Resistance-Trained Individuals: A Randomized Controlled Trial.
- Can I Have My Coffee and Drink It? A Systematic Review and Meta-analysis to Determine Whether Habitual Caffeine Consumption Affects the Ergogenic Effect of Caffeine.
- Effects of modafinil and caffeine on night-time vigilance of air force crewmembers: A randomized controlled trial.
- Acute effects of caffeine on attention: a comparison of non-consumers and withdrawn consumers.
- Performance and alertness effects of caffeine, dextroamphetamine, and modafinil during sleep deprivation.