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Theanine XR Stress Relief

product on market Tablet or Pill Life Extension Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 67% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

✨ AI-generated · Qwen 3.6 · methodology

L-theanine is supported by moderate evidence for its ability to promote relaxation and reduce stress. Calcium and phosphorus are essential minerals that support various cellular functions. Research on the specific extended-release formulation of theanine is limited compared to standard versions.

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

Label

Product Label

Label for Theanine XR Stress Relief
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Vegetarian Tablet(s)
Serving Size
30
Servings
Other Combinations
Product Type
67%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Calcium
50 mg (4% DV)
40 mg (3% DV)
Within RDA (0.1× RDA) 13 studies (A:0, B:3)
400 mg
Market median: 200.0mg (358 products) 9 studies (A:0, B:2)

Other Ingredients

Microcrystalline Cellulose Hydroxypropyl Methylcellulose Hydroxypropyl Cellulose Stearic Acid Silica Stearate Croscarmellose Sodium Glycerin
Claims

Label Claims — Verification

Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Directions: Take one (1) tablet daily, or as recommended by a healthcare practitioner.

Warnings & Precautions

Read the entire label and follow the directions carefully prior to use.

Warnings: Keep out of reach of children.

Do not exceed recommended dose. Do not purchase if outer seal is damaged.

Consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.

To report a serious adverse event or obtain product information, contact 1-866-280-2852.

Formulation Notes

Gluten free Non GMO Le certified

Immediate and extend release L-Theanine

Additional Information

Scan for product info

Non GMO Le certified

Store tightly closed in a cool, dry place.

Metadata

Product Details

UPC / SKU7 37870 24293 2
DSLD Entry Date2025-05-21
Product TypeOther Combinations
FormTablet or Pill
BrandLife Extension
DSLD ID328727
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
View all evidence for L Theanine →
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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.