L-Theanine 200 mg

product on market Capsule Country Life 🟢 Safety: 100/100
Brand: Country Life
🟢 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
30 Servings
Other Combinations Product Type
100% Evidence Coverage

Supplement Facts — Evidence Check

4.25 mg (250% DV)
📊 3.3× RDA — above typical dose (UL: 100 mg) 📚 113 studies (Tier A: 3, B: 35)
RDA 1.3mg This product: 4.25mg UL 100mg
200 mg
📊 Market median: 200.0mg (358 products) 📚 9 studies (Tier A: 0, B: 2)
This product: 200mg

Other Ingredients

Cellulose Cellulose Magnesium Stearate Silica

Label Claims — Verification

❓ Nutrient
❓ All Other
❓ Structure/Function
All Other (99% of products) Structure/Function (92% of products) Nutrient (22% of products)

Target Groups

Vegan Vegetarian Adult (18 - 50 Years) Kosher Halal Gluten Free Dairy Free

Product Information

📋 Directions for Use

Directions: Adults take one (1) capsule daily on an empty stomach.

⚠️ Warnings & Precautions

As a reminder, discuss the supplements and medications that you take with your health care providers.

Caution: If you are pregnant, nursing, or taking medication, have a medical condition or planning surgery, consult a doctor before using this product.

Stop using and consult a doctor if any adverse reactions occur. Do not accept if seal is broken.

Keep out of the reach of children.

🧪 Formulation Notes

Country Life uses only Suntheanine, a form of L-Theanine with over 50 studies and patents. L-Theanine has been referred to as the happy amino for its ability to help reduce stress. It has also been shown to help diminish normal symptoms of PMS when taken 400 mg daily.

Yes Non-GMO project verified Yes certified gluten free by gfco.org No yeast, corn or wheat No soy, milk or salt No sugar or preservatives No artificial colors, flavors or sweeteners

Yes vegan by the AVA

Yes manufacturing supports wind power

Yes Kosher

Yes certified halal by Ifanca

Suntheanine

Certified gluten-free

Gently soothes away the tension Helps reduce stress

Includes vitamin B-6 for utilization

Non GMO Project Verified nongmoproject.org

Our Pledge of Integrity Authenticity Cleanliness Freshness Consistency Accuracy

This product has been manufactured at a GMP registered facility.

Additional Information

Yes recyclable packaging

Certified B Corporation Certified Gluten Free GFCO.org (Gluten-Free Certification Organization) IFANCA Certified Crescent M Halal K (Kosher)

Non GMO Project Verified nongmoproject.org

Store in a dry place between 59 degrees - 86 degrees F.

Product Details

UPC / SKU 0 15794 01411 9
DSLD Entry Date 2025-08-22
Product Type Other Combinations
Form Capsule
Brand Country Life
DSLD ID 333296
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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