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L-Theanine 250 mg

product on market Capsule Arazo Nutrition 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 moderate evidence for promoting relaxation and reducing stress. Inositol is researched for its role in cellular signaling and mood regulation, though evidence for general supplementation is more limited. Both ingredients are generally recognized as safe for consumption.

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

Label

Product Label

Label for L-Theanine 250 mg
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

250 mg
Market median: 200.0mg (358 products) 9 studies (A:0, B:2)
100 mg
Market median: 550.0mg (217 products) 29 studies (A:0, B:5)

Other Ingredients

Rice Flour Vegetable capsule Vegetable Magnesium Stearate Silicon Dioxide
Claims

Label Claims — Verification

Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Suggested Use: As a dietary supplement, take one (1) vegetable capsule, one to two times daily, as needed, preferably on an empty stomach, or as directed by your health care professional.

Warnings & Precautions

Caution: Do not exceed recommended serving.

Pregnant or nursing mothers, children under the age of 18, and individuals with a known medical condition should consult a physician before using this or any dietary supplement.

Pregnant or nursing mothers, children under the age of 18, and individuals with a known medical condition should consult a physician before using this or any dietary supplement.

Keep out of the reach of children.

Do not use if safety seal is damaged or missing.

Formulation Notes

Focus Relax Calm

L-Theanine 250 mg with Inositol 100 mg

Extra strength Natural antioxidant

Additional Information

Store at room temperature.

Formulated in USA GMP Good manufacturing practice Sourced from a certified facility Third Party Tested

Metadata

Product Details

UPC / SKUX001MCX3XH
DSLD Entry Date2020-11-21
Product TypeNon-Nutrient/Non-Botanical
FormCapsule
DSLD ID237162
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.