L-Theanine 200 mg

product on market Capsule Nature's Trove 🟢 Safety: 100/100
Brand: Nature's Trove
🟢 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
120 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)
This product: 200mg

Other Ingredients

Vegetable Capsule Microcrystalline Cellulose Silicon Dioxide Vegetable Magnesium Stearate

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) Kosher Gluten Free Dairy Free

Product Information

📋 Directions for Use

Recommended dosage: As a dietary supplement, take one or two capsule daily, or as directed by a physician.

⚠️ Warnings & Precautions

Caution: When using nutritional supplements, please inform your healthcare professional if you have a medical condition.

Pregnant or lactating women should consult their physician before taking this product. If you are currently taking prescription antidepressants such as MAOI’s or SSRI’s, consult your physician before taking this product.

Warning: Keep out of reach of children.

🧪 Formulation Notes

Promotes relaxation Restores a sense of calm

Found naturally in green tea All natural ingredients

Star K Kosher

No peanuts, eggs, dairy, soy, wheat, yeast, gluten, tree nuts, crustacean shellfish, fish, or other animal by products.

100% vegetarian

Additional Information

Discover the treasure of nature Dig into earth's boundless reserves of essential vitamins to restore your innate equilibrium. Good health from the source.

Store in cool dry place.

Star K Kosher

GMP Good Manufacturing Practice Consistent Quality

Made in U.S.A.

Product Details

UPC / SKU 6 86149 70004 1
DSLD Entry Date 2020-06-24
Product Type Non-Nutrient/Non-Botanical
Form Capsule
Brand Nature's Trove
DSLD ID 229448
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
Systematic Review Nutritional neuroscience 2026
PubMed DOI
B The effects of L-theanine consumption on sleep outcomes: A systematic review and meta-analysis
Meta Analysis Sleep medicine reviews 2025
PubMed DOI
B The combination of L-theanine and caffeine improves cognitive performance and increases subjective alertness
Rct Nutritional neuroscience 2010
PubMed DOI
B Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial
Rct Nutrients 2019
PubMed DOI
B The Role of Supplements and Over-the-Counter Products to Improve Sleep in Children: A Systematic Review
Systematic Review International journal of molecular sciences 2023
PubMed DOI
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
Meta Analysis Nutrition reviews 2025
PubMed DOI
B Effect of Alpha-S1-Casein Tryptic Hydrolysate and L-Theanine on Poor Sleep Quality: A Double Blind, Randomized Placebo-Controlled Crossover Trial
Rct Nutrients 2022
PubMed DOI
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
Rct Nutritional neuroscience 2025
PubMed DOI
B The combined effects of L-theanine and caffeine on cognitive performance and mood
Rct Nutritional neuroscience 2008
PubMed DOI
B Acute effects of tea constituents L-theanine, caffeine, and epigallocatechin gallate on cognitive function and mood: a systematic review and meta-analysis
Meta Analysis Nutrition reviews 2014
PubMed DOI
View all evidence for L Theanine →

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