Suntheanine L-Theanine 100 mg
Goals
$18.87 $0.62 per serving
Product analysis
Suntheanine L-Theanine 100 mg may help you feel calmer and support sleep quality when stress makes it harder to settle. Benefits for attention are less consistent, so it is better suited to relaxation than a dependable boost in focus.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality20
Missing form details make ingredient quality hard to compare confidently. The omissions do not by themselves show that the ingredients perform poorly.
Ingredient Transparency63
Ingredient amounts are disclosed, making it easier to compare serving sizes. Forms are omitted, leaving less clarity about exactly what is included.
Value For Money72
The theanine portion offers favourable value for the amount provided. Carbohydrate value cannot be established, so the price comparison is clearest for theanine.
Customer Satisfaction87
Customers give consistently positive ratings, with a sizeable number of responses behind them. Ratings describe satisfaction and do not establish effectiveness or safety.
Product Focus76
Relaxation and stress-related sleep support are the clearest uses. The wider attention and mood possibilities are less certain and should not be treated as dependable improvements.
- Format
Tablet - Container
- 60 Tablet(s)
- Per serving
- $0.62
- Also available
Suntheanine L-Theanine 100 mg$35.67- Customer rating
- 4.7 · 3,976 ratings
Goals
Impact
Highest effect
Theanine · 200 mg
Impact
Moderate effect
Impact
High effect
Theanine · 200 mg
Impact
High effect
Theanine · 200 mg
Impact
Highest effect
Theanine · 200 mg
Impact
High effect
Impact
High effect
Theanine · 200 mg
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
Calories | 15 Calorie(s) | |
Total Carbohydrates | 4 Gram(s) | |
Suntheanine L-Theanine | 200 mg |
Theanine · 200 mg OverallScore96
200 mg of L-theanine per serving comes at a competitive cost per 100 mg. That amount is within the range associated with relaxation and focus. The source is Suntheanine.
How this ingredient is rated
Active Ingredient Quality & Bioavailability100
It uses L-theanine, the form associated with calming and focus. The source is Suntheanine.
Isomer Specificity (L-Theanine)
It uses L-theanine, the form associated with calming and focus.
Branded Forms & Purity Standards
The source is Suntheanine.
Dose, Safety & Label Transparency100
A serving provides 200 mg of L-theanine. That amount is within the range associated with relaxation and focus. The amount and source are individually stated.
Theanine Dosage Efficacy
A serving provides 200 mg of L-theanine. That amount is within the range associated with relaxation and focus.
Label Transparency & Blends
The amount and source are individually stated.
Value80
The cost per 100 mg of theanine is competitive.
Price per 100mg L-Theanine
The cost per 100 mg of theanine is competitive.
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.