L-Theanine
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
Have a supplement label? Find it here.
Upload a photo of any supplement label to search our database of 92,312 products.
Label Data
200 mg
Serving Size
2500
Servings
Non-Nutrient/Non-Botanical
Product Type
100%
Evidence Coverage
Supplement Facts — Evidence Check
200 mg
📊 Market median: 200.0mg (358 products)
📚 9 studies (Tier A: 0, B: 2)
Label Claims — Verification
❓
All Other
❓
Structure/Function
All Other (99% of products)
Structure/Function (92% of products)
Nutrient (22% of products)
Target Groups
Adult (18 - 50 Years)
Gluten Free
Dairy Free
Product Information
📋 Directions for Use
Suggested use: As a dietary supplement, take 200 mg once or twice daily, or as directed by a physician.
⚠️ Warnings & Precautions
Always consult a physician before taking any dietary supplement.
Keep out of reach of children.
🧪 Formulation Notes
Free of: Added sugar, soy, dairy, yeast, gluten, additives
Additional Information
Use an accurate milligram scale.
Contents are sold by weight, not volume. Settling may occur. Store in a dry, cool place
New
Product Details
UPC / SKU
X000HFGPLH
DSLD Entry Date
2024-05-23
Product Type
Non-Nutrient/Non-Botanical
Form
Powder
Brand
BulkSupplements.com
DSLD ID
312276
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
Compare Similar Products
L-Theanine
PureBulk.com
100
L-Theanine
NOW
100
L-Theanine
Hard Rhino
100
L-Theanine
Hard Rhino
100
L-Theanine
Hard Rhino
100