L-Theanine 200 mg

product on market Softgel Capsule SR Sports Research 🟢 Safety: 100/100
Brand: SR Sports Research
🟢 100/100

This product looks safe

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

Product Label

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Label Data

1 Liquid Softgel(s) Serving Size
60 Servings
Non-Nutrient/Non-Botanical Product Type
100% Evidence Coverage

Supplement Facts — Evidence Check

200 mg
📊 Market median: 200.0mg (358 products) 📚 9 studies (Tier A: 0, B: 2)
This product: 200mg

Other Ingredients

Coconut Oil, Virgin Beeswax Gelatin Glycerin Water, Purified

Label Claims — Verification

❓ All Other
❓ Structure/Function
All Other (99% of products) Structure/Function (92% of products) Nutrient (22% of products)

Target Groups

Adult (18 - 50 Years)

Product Information

📋 Directions for Use

Suggested Use: As a dietary supplement, healthy adults take 1 liquid softgel daily with or without food. Best when taken as directed by a healthcare professional.

⚠️ Warnings & Precautions

Allergen Warning: Contains tree nuts (coconut).

Not Manufactured With: Milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat, soy or gluten. Produced in a third-party, audited and registered cGMP compliant facility that may process other products that contain these allergens or ingredients.

Caution: Keep out of the reach of children and pets.

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

Do not exceed recommended daily intake. Do not use if seal is damaged or missing.

🧪 Formulation Notes

SR L-Theanine contains the premium, patented, branded ingredient Suntheanine. Formulated with virgin coconut oil, SR L-Theanine is an easy way to add L-Theanine to your daily routine. Made with Suntheanine Formulated with coconut oil

IGEN Non-GMO Tested

Manufactured and Quality Tested in USA. Ingredients carefully sourced from around the world.

With coconut oil

Made with Non-GMO Ingredients Gluten Free

Not Manufactured With: Milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat, soy or gluten.

Additional Information

Please recycle 90 Days money back guarantee Satisfaction Guarantee We offer a full refund on the purchase price of your order (minus return cost) within 90 days of purchase. Restrictions apply. Please visit sportsresearch.com for full details. Track your lot number, and view third party independent testing. Instagram Facebook YouTube Snapchat Twitter @sportsresearch

cGMP Compliant Good Manufacturing Practice 3rd Party Quality Tested IGEN Non-GMO Tested

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

Product Details

UPC / SKU 0 23249 01017 3
DSLD Entry Date 2022-06-16
Product Type Non-Nutrient/Non-Botanical
Form Softgel Capsule
Brand SR Sports Research
DSLD ID 268507
Data Updated 2026-04-11

Research Evidence

37 Research Sources
53 Avg Quality Score
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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