$5.30 $0.17 per serving
Product analysis
L-Theanine 100 mg may help ease tension during stressful tasks and support calm attention in the short term. Effects vary across people and tasks, and lasting improvements in mood or sleep are less certain.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality100
Theanine is supplied as the clearly identified L-theanine form. That gives a well-supported ingredient identity without establishing a predictable personal response.
Ingredient Transparency100
Both the amount and L-theanine form are disclosed. That makes the serving easy to compare with other theanine supplements.
Value For Money80
The theanine contribution offers good value for the amount supplied. Its usefulness still depends on the particular short-term effect a buyer is seeking.
Customer Satisfaction91
Customer ratings are favorable across a very large review base. They provide extensive satisfaction feedback without proving lasting mood or sleep improvements.
Product Focus66
The clearest connection is to short-term relaxation and calm attention during demanding tasks. Findings for sleep, broader cognition and lasting mood change are more limited and mixed.
- Format
Capsule - Container
- 30 Capsule(s)
- Per serving
- $0.17
- Also available
L-Theanine 100 mg$9.43- Customer rating
- 4.7 · 25,117 ratings
Goals
Impact
High effect
Theanine · 100 mg
Impact
High effect
Theanine · 100 mg
Impact
High effect
Theanine · 100 mg
Impact
High effect
Theanine · 100 mg
Impact
High effect
Impact
High effect
Theanine · 100 mg
Impact
Moderate effect
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
AlphaWave (L-Theanine) | 100 mg |
Theanine (L-Theanine) · 100 mg OverallScore96
The serving supplies 100 mg of L-Theanine at a moderate cost per 100 mg. That's an amount associated with relaxation and focus. It uses a branded source, though its name is not specified in the available information.
How this ingredient is rated
Active Ingredient Quality & Bioavailability100
The ingredient is specified as L-Theanine. It uses a branded source, though its name is not specified in the available information.
Isomer Specificity (L-Theanine)
The label specifies L-Theanine, the active form associated with calming and focus.
Branded Forms & Purity Standards
It uses a branded source, though its name is not specified in the available information.
Dose, Safety & Label Transparency100
The label clearly lists 100 mg per serving, an amount associated with relaxation and focus.
Theanine Dosage Efficacy
The serving provides 100 mg, an amount associated with relaxation and focus.
Label Transparency & Blends
The theanine amount and source are individually disclosed.
Value80
The cost per 100 mg of theanine is moderate.
Price per 100mg L-Theanine
The cost per 100 mg of theanine is moderate.
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.