Suntheanine L-Theanine 150 mg
100/100
This product looks safe
- No ingredients exceed tolerable upper intake levels
- 100% of ingredients have research evidence
A
Label Compliance Grade
Product Label
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Label Data
1 Capsule(s)
Serving Size
10
Servings
Amino acid/Protein
Product Type
100%
Evidence Coverage
Supplement Facts — Evidence Check
150 mg
📊 Market median: 200.0mg (358 products)
📚 9 studies (Tier A: 0, B: 2)
Other Ingredients
Rice powder
Vegetable Capsule
Label Claims — Verification
❓
All Other
All Other (99% of products)
Structure/Function (92% of products)
Nutrient (22% of products)
Target Groups
Vegetarian
Adult (18 - 50 Years)
Product Information
⚠️ Warnings & Precautions
Suggested Adult Use: Take 1 capsule daily, away from food, or as directed by a health care professional.
🧪 Formulation Notes
Suitable for Vegetarians
Additional Information
RELAXATION WITHOUT DROWSINESS* REDUCES STRESS AND TENSION*
R 01/12
CONTAINS NOTHING OTHER THAN LISTED INGREDIENTS
Product Details
UPC / SKU
7 53950 00236 4
DSLD Entry Date
2013-09-25
Product Type
Amino acid/Protein
Form
Capsule
Brand
Doctor's Best
DSLD ID
25543
Data Updated
2026-04-11
Research Evidence
37
Research Sources
53
Avg Quality Score
22
Rct
10
Systematic Review
3
Meta Analysis
1
Clinical Trial
1
Openfda Safety
B
Examining the effect of L-theanine on sleep: a systematic review of dietary supplementation trials
B
The effects of L-theanine consumption on sleep outcomes: A systematic review and meta-analysis
B
The combination of L-theanine and caffeine improves cognitive performance and increases subjective alertness
B
Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial
B
The Role of Supplements and Over-the-Counter Products to Improve Sleep in Children: A Systematic Review
B
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
B
Effect of Alpha-S1-Casein Tryptic Hydrolysate and L-Theanine on Poor Sleep Quality: A Double Blind, Randomized Placebo-Controlled Crossover Trial
B
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
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