L-Theanine 200 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
60
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)
Other Ingredients
Microcrystalline Cellulose
Cellulose
Leucine
Label Claims — Verification
❓
All Other
❓
Structure/Function
All Other (99% of products)
Structure/Function (92% of products)
Nutrient (22% of products)
Target Groups
Vegetarian
Adult (18 - 50 Years)
Gluten Free
Product Information
📋 Directions for Use
Suggested Use: As a dietary supplement, take 1 capsule daily, or as directed by your healthcare practitioner.
⚠️ Warnings & Precautions
Warning: If pregnant or nursing, consult your healthcare practitioner before taking this product.
Keep out of reach of children.
To obtain product information or report a serious adverse event, call 1-800-325-1776.
🧪 Formulation Notes
Color of this product may vary due to color variations of the natural ingredients.
A Dietary Supplement to support relaxation and reduce irritability and low mood states
Vegetarian
Gluten free
Additional Information
Truth We pledge total truth in labeling. Our family of products contains only the purest and most potent ingredients. Guaranteed.
Store in a cool, dry place.
Product Details
UPC / SKU
0 26664 21326 6
DSLD Entry Date
2024-02-22
Product Type
Non-Nutrient/Non-Botanical
Form
Capsule
Brand
DaVinci Laboratories
DSLD ID
305233
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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