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Zen Theanine

product on market Capsule AOR Advanced Orthomolecular Research Premium Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 100% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

AI-generated · Qwen 3.6 · grounded in 1 source · methodology

L-theanine is supported by strong evidence for its ability to promote relaxation and reduce stress without causing sedation. Research indicates it may improve cognitive function and attention when paired with caffeine. The ingredient profile maintains a high safety rating based on available clinical data.

AI-generated summary based on research evidence. Not medical advice.

Label

Product Label

Label for Zen Theanine
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Capsule(s)
Serving Size
120
Servings
Non-Nutrient/Non-Botanical
Product Type
100%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Market median: 200.0mg (358 products) 9 studies (A:0, B:2)

Other Ingredients

Microcrystalline Cellulose Capsule
Claims

Label Claims — Verification

Unverified All Other
Unverified Structure/Function
Info

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

Metadata

Product Details

UPC / SKU6 24917 08341 5
DSLD Entry Date2020-03-24
Product TypeNon-Nutrient/Non-Botanical
FormCapsule
DSLD ID214728
Data Updated2026-04-11
Research

Research Evidence

37
Research Sources
53
Avg Quality
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
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.