Home/ Supplements/ L Theanine/ L-Theanine 200 mg

L-Theanine 200 mg

product on market Softgel Capsule Sports Research 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 that research suggests may promote relaxation and reduce stress. There is moderate evidence supporting its ability to improve attention and cognitive performance when paired with caffeine. The ingredient is generally recognized as safe for consumption.

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

Label

Product Label

Label for L-Theanine 200 mg
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Softgel(s)
Serving Size
60
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

Coconut Oil, Virgin Gelatin Glycerin Water, Purified Beeswax
Claims

Label Claims — Verification

Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Suggested Use: Adults take 1 softgel daily with or without food, or as recommended by a qualified healthcare professional.

Warnings & Precautions

Caution: Keep out of reach of children and pets.

Caution: Keep out of reach of children and pets. Do not exceed recommended daily intake. Do not use if safety seal is damaged or missing.

Consult with a qualified healthcare professional prior to using this product, especially if you are pregnant, nursing, have a diagnosed medical condition, are taking a prescription medication.

Contains: Tree nuts (coconut).

Formulation Notes

Quality matters: IGEN Non-GMO Tested Non-GMO tested Gluten-free

Third party tested cGMP Compliant

Double strength When compared to standard L-Theanine softgels with only 100mg content. Supports relaxation & focus

L-Theanine 200mg per serving Suntheanine

NON BPA Gluten-free Non-GMO

Proudly manufactured in the USA with carefully selected ingredients of domestic and international origins.

Additional Information

IGEN Non-GMO Tested

Store at room temperature, in a dry place. Protect product from excessive heat, freezing, humidity and light.

HDPE Please recycle Scan for more

@sportsresearch

Metadata

Product Details

UPC / SKU0 23249 01017 3
DSLD Entry Date2025-02-23
Product TypeNon-Nutrient/Non-Botanical
FormSoftgel Capsule
BrandSports Research
DSLD ID326262
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 →
Compare

Similar Products

Tranquil Sleep
Natural Factors Stress-Relax · Softgel Capsule
100
Tranquil Sleep
Natural Factors Stress-Relax · Softgel Capsule
100
L-Theanine
SmarterVitamins · Softgel Capsule
100
L-Theanine 200 mg
SportsResearch · Softgel Capsule
100
L-Theanine 200 mg
SR Sports Research · Softgel Capsule
100
View all L Theanine products →
L Theanine research Best L Theanine All L Theanine products More from Sports Research View on NIH DSLD →

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