$32.50 $0.54 per serving
Product analysis
L-Theanine 100 mg may help with relaxation and calm attention, though lasting effects are uncertain.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality20
The theanine and glycine forms are unspecified. That limits a close comparison of ingredient quality.
Ingredient Transparency63
The theanine and glycine amounts are stated, helping clarify serving contents. Their forms are not identified, leaving a useful comparison detail unresolved.
Value For Money43
The theanine amount offers middling value, while glycine offers weaker value for the full serving price. The combination therefore gives a mixed value picture.
Customer Satisfaction73
Customer ratings are very positive. The small review pool leaves the satisfaction pattern less established than for widely reviewed products.
Product Focus62
Theanine may support relaxation and calm attention, with mixed findings for broader cognitive benefits. The serving is smaller than amounts used in some sleep findings, while the glycine amount is too low to match preliminary sleep research.
- Format
Capsule - Container
- 60 Capsule(s)
- Per serving
- $0.54
- Customer rating
- 4.8 · 86 ratings
Goals
Impact
Moderate effect
Theanine · 100 mg
Impact
Moderate effect
Impact
Moderate effect
Theanine · 100 mg
Impact
High effect
Glycine · 300 mgTheanine · 100 mg
Impact
High effect
Theanine · 100 mgGlycine · 300 mg
Impact
Moderate effect
Theanine · 100 mg
Impact
Moderate effect
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
L-Theanine Suntheanine | 100 mg | |
Glycine | 300 mg |
Theanine · 100 mg OverallScore90
Each serving provides 100 mg of L-theanine, with a higher cost per 100 mg. The source is branded.
How this ingredient is rated
Active Ingredient Quality & Bioavailability100
The form is L-theanine. It uses a branded source.
Isomer Specificity (L-Theanine)
The ingredient is listed as L-theanine, the form associated with calming and focus.
Branded Forms & Purity Standards
It uses a branded source.
Dose, Safety & Label Transparency100
Each serving provides 100 mg of L-theanine. The amount and source are clearly listed.
Theanine Dosage Efficacy
Each serving provides 100 mg of L-theanine.
Label Transparency & Blends
The amount and source of L-theanine are disclosed.
Value50
The cost per 100 mg of theanine is higher.
Price per 100mg L-Theanine
The cost per 100 mg of theanine is higher.
Glycine · 300 mg OverallScore48
300 mg of glycine per serving comes at a high cost per gram. The glycine is from a GMP-compliant facility. Ordinary capsule or tablet ingredients are indicated, but specific excipients are not named.
How this ingredient is rated
Active Ingredient Quality & Bioavailability60
The glycine is from a GMP-compliant facility.
Glycine Sourcing and Purity Standards
The glycine is from a GMP-compliant facility.
Dose, Safety & Label Transparency46
It provides 300 mg of glycine per serving. Ordinary capsule or tablet ingredients are indicated, but specific excipients are not named.
Clinically Relevant Dosage
It provides 300 mg of glycine per serving.
Label Transparency and Yield Disclosure
The glycine amount is stated.
Clean Label and Excipient Quality
Ordinary capsule or tablet ingredients are indicated, but specific excipients are not named.
Value30
The cost per gram of glycine is high.
Cost Efficiency per 1,000mg of Glycine
The cost per gram of glycine is high.
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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.
- [Augmentation of antipsychotics with glycine may ameliorate depressive and extrapyramidal symptoms in schizophrenic patients--a preliminary 10-week open-label study].
- Markers of glutamate signaling in cerebrospinal fluid and serum from patients with bipolar disorder and healthy controls.
- Erythrocyte glycine in depressed, hypomanic, and euthymic bipolar patients treated with lithium carbonate.
- 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.