$10.06 $0.16 per serving
Product analysis
L-Theanine 200 mg may help with relaxation and some aspects of sleep quality. Calm attention is also possible, although findings for everyday focus are mixed.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality20
The precise theanine form is not disclosed, limiting a confident quality comparison. The stated amount alone does not resolve that uncertainty.
Ingredient Transparency63
The theanine amount is stated, so you can see how much a serving contains. Its precise form is not disclosed, making comparisons less straightforward.
Value For Money100
The cost looks economical for the amount of theanine provided. Its simple ingredient list also makes the basis of that cost comparison clear.
Customer Satisfaction91
Customer ratings are favorable across a very large body of feedback. The feedback gives a broad view of satisfaction without proving effects on sleep or attention.
Product Focus76
A single featured ingredient keeps the formula centered on relaxation and calm attention. The wider aims around mood, cognition and productivity have less consistent support.
- Format
Capsule - Container
- 60 Capsule(s)
- Per serving
- $0.16
- Also available
L-Theanine 100 mg$9.43- Customer rating
- 4.7 · 17,164 ratings
Goals
Impact
High effect
Theanine · 200 mg
Impact
High effect
Theanine · 200 mg
Impact
High effect
Impact
Highest effect
Theanine · 200 mg
Impact
Moderate effect
Impact
High effect
Theanine · 200 mg
Impact
Highest effect
Theanine · 200 mg
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
L-Theanine | 200 mg |
Theanine · 200 mg OverallScore100
Each serving provides 200 mg of L-Theanine, with a low cost for the amount. A branded form is indicated, though its name is not specified.
How this ingredient is rated
Active Ingredient Quality & Bioavailability100
The ingredient is specified as L-Theanine. A branded form is indicated, though its name is not specified.
Isomer Specificity (L-Theanine)
The ingredient is specified as L-Theanine.
Branded Forms & Purity Standards
A branded form is indicated, though its name is not specified.
Dose, Safety & Label Transparency100
The label gives an individual amount of 200 mg per serving.
Theanine Dosage Efficacy
Each serving provides 200 mg of L-Theanine.
Label Transparency & Blends
The individual theanine amount is disclosed.
Value100
The cost for the amount of theanine is low.
Price per 100mg L-Theanine
The cost for the amount of theanine is low.
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.