🟢 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
240 Servings
Amino acid/Protein Product Type
100% Evidence Coverage

Supplement Facts — Evidence Check

100 mg
📊 Market median: 200.0mg (358 products) 📚 9 studies (Tier A: 0, B: 2)
This product: 100mg

Other Ingredients

Vitamin D Vitamin E Cyclodextrin Maltodextrin 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

Adult (18 - 50 Years) Kosher Halal

Product Information

📋 Directions for Use

Because it has a mild taste, capsules may be opened and dissolved in water.

Suggested Use: Take 1 to 2 capsules per day with water or juice on an empty stomach, or as directed by your qualified health consultant.

⚠️ Warnings & Precautions

Although it is probably safe for pregnant women and nursing mothers, we discourage its use by them pending conclusive research.

Caution: L-theanine enhances chemotherapy effects. If you are receiving chemotherapy, check with your doctor.

🧪 Formulation Notes

Theanine 99.7% Pure (Research Grade)

Additional Information

L-theanine, a unique free form amino acid found in green tea and various mushrooms, has been shown to increase tranquilizing alpha-waves without inducing drowsiness. Clinical studies have shown it to be effective in single doses of 100 to 200 mg 1 to 3 times daily or as needed depending on stress and anxiety levels. For those seeking a continuous mood eleveating effect, one capsule can be taken four times throughout the day. Based on the results of clinical studies, L-theanine is most effective in the range 50-200 mg, with the effect being felt within 30 minutes and lasting for 8-10 hours. Individuals with high stress levels may increase their dosage of L-theaning to at least 100 mg, with no more than 600 mg being taken in a six hour period. FDA recommends a maximum dose of 1200 mg daily, although the reason for this limit is not clear, due to its demonstrated safety. There are no known adverse reactions to L.theanine and no drug interactions have been reported. L-theanine is not affected by food and may be taken anytime, as needed.

Meditation in a Bottle

100% Kosher and Halal approved vegetable capsule.

Product Details

UPC / SKU 6 79840 87182 0
DSLD Entry Date 2012-07-25
Product Type Amino acid/Protein
Form Capsule
DSLD ID 11370
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
B The effects of L-theanine consumption on sleep outcomes: A systematic review and meta-analysis
Meta Analysis Sleep medicine reviews 2025
B The combination of L-theanine and caffeine improves cognitive performance and increases subjective alertness
Rct Nutritional neuroscience 2010
B Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial
Rct Nutrients 2019
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
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
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
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
B The combined effects of L-theanine and caffeine on cognitive performance and mood
Rct Nutritional neuroscience 2008
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
View all evidence for L Theanine →

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