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
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Label Data
2 Capsule(s)
Serving Size
15
Servings
Botanical
Product Type
100%
Evidence Coverage
Supplement Facts — Evidence Check
1000 mg
📊 Market median: 260.0mg (249 products)
📚 156 studies (Tier A: 4, B: 61)
Other Ingredients
Acacia Gum
Label Claims — Verification
❓
All Other
All Other (99% of products)
Structure/Function (92% of products)
Nutrient (22% of products)
Target Groups
Adult (18 - 50 Years)
Women (not pregnant or lactating)
Product Information
📋 Directions for Use
Directions: Adults. Take 2 to 4 vegetarian capsules a day.
⚠️ Warnings & Precautions
Precautions: Contains caffeine (50 mg per daily dose).
Not recommended for children and pregnant women.
Not recommended for children and pregnant women.
Do not exceed the recommended daily dose. This product is a nutritional supplement and should not replace a varied, balanced diet.
Keep out of children's reach.
As with any nutritional supplement, you should consult a health professional before taking this product if you are pregnant, breastfeeding or have a health problem.
Product Details
UPC / SKU
5 453003 822660
DSLD Entry Date
2025-06-25
Product Type
Botanical
Form
Capsule
Brand
SuperSmart
DSLD ID
332750
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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