🟢 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

📊 Market median: 200.0mg (358 products) 📚 9 studies (Tier A: 0, B: 2)
This product: 225mg

Other Ingredients

Microcrystalline Cellulose Capsule

Label Claims — Verification

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) Gluten Free Dairy Free

Product Information

⚠️ Warnings & Precautions

Do not use if safety seal is broken

Caution: Consult your physician before use if you are pregnant, lactating, have a medical condition, or if you’re taking any medication.

Consult a health care practitioner if you have a liver disorder, or if you have an iron deficiency.

Keep out of reach of children.

To report a serious adverse event or obtain product information, call 1-866-215-0450

🧪 Formulation Notes

GMP Manufacturing Quality assured Independent testing

Discussion: Zen Theanine is L-theanine, a unique amino acid found primarily in green tea associated with promoting calm and relaxed alertness.* Made with Suntheanine, a 100% pure L-isomer-theanine.

Promotes relaxation without drowsiness

Vegan

Non-GMO Gluten free

AOR guarantees that all ingredients have been declared on the label.

Made without wheat, gluten, corn, nuts, peanuts, soy, dairy, eggs, fish, shellfish or any animal byproduct.

Additional Information

Store tightly sealed in a cool, dry place

Directions: Take 1 capsule daily without food, or as directed by a qualified health care practitioner.

Product of Canada

Product Details

UPC / SKU 6 24917 08341 5
DSLD Entry Date 2020-03-24
Product Type Non-Nutrient/Non-Botanical
Form Capsule
DSLD ID 214728
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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