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SunTheanine

product on market Capsule Tomorrow's Nutrition Pro 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

Suntheanine is a patented form of L-theanine, an amino acid associated with promoting relaxation and reducing stress. There is strong evidence supporting its ability to lower anxiety and improve focus without causing sedation. Research indicates it is generally well-tolerated and safe for most users.

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

Label

Product Label

Label for SunTheanine
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Capsule(s)
Serving Size
62
Servings
Non-Nutrient/Non-Botanical
Product Type
100%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

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

Other Ingredients

Vegetable Cellulose Rice Extract
Claims

Label Claims — Verification

Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Recommendations: Adults, as a dietary supplement, take once or twice daily.

Warnings & Precautions

Do not use if safety seal is broken or missing.

Keep out of reach of children.

Warning: If pregnant, nursing, or taking prescription drugs, consult your healthcare practitioner prior to use.

Formulation Notes

Tomorrow’s Nutrition Pro Suntheanine delivers 200 mg of clinically proven, award-winning and patented L-theanine.

OK

Gluten free Non-dairy Non-GMO

Vegan

L-Theanine 200

Contains no artificial sweeteners, dairy, wheat or yeast.

Additional Information

Supports stress relief Improves quality of sleep Improves mental focus

OK

BPA free bottle

Improves focus & concentration Reduces stress without drowsiness

Store in a cool dry place.

Metadata

Product Details

UPC / SKU8 50236 00417 0
DSLD Entry Date2017-06-23
Product TypeNon-Nutrient/Non-Botanical
FormCapsule
DSLD ID74993
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.