L-Theanine 100 mg

product on market Capsule Exchange Select 🟢 Safety: 100/100
Brand: Exchange Select
🟢 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

📄 Open Full PDF View on NIH DSLD →
📸

Have a supplement label? Find it here.

Upload a photo of any supplement label to search our database of 92,312 products.

Label Data

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

Supplement Facts — Evidence Check

100 mg
📊 Market median: 200.0mg (358 products) 📚 9 studies (Tier A: 0, B: 2)
This product: 100mg

Other Ingredients

Dicalcium Phosphate L-Theanine Gelatin Silicon Dioxide Magnesium Stearate Polyethylene Glycol Acetic Acid Sodium Lauryl Sulfate

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) Gluten Free

Product Information

📋 Directions for Use

Directions: Adults - Take one capsule daily with food as a dietary supplement.

⚠️ Warnings & Precautions

Safety sealed. Do not use if printed seal under cap is cut, torn, or missing.

Keep out of the reach of children.

Warning: Pregnant or nursing women, individuals taking medication(s) or persons who have a health condition should consult their physician before using this product.

🧪 Formulation Notes

No artificial colors or flavors No gluten ~ No lactose ~ No trans fat

Additional Information

Targeted health ~ Supports relaxation health

Quality value

Store at 15(0) - 30(0) C (59(0) - 86(0) F).

Works gently and naturally to promote relaxation without drowsiness. Enhances endocrine function, stimulating some brain waves and leaving others unaffected.

"Satisfaction guaranteed or your money back."

137143 518632 USA646942

Product Details

UPC / SKU 6 14299 03840 0
DSLD Entry Date 2017-08-22
Product Type Non-Nutrient/Non-Botanical
Form Capsule
Brand Exchange Select
DSLD ID 76815
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 →

Compare Similar Products

L-Theanine XYMOGEN 100
L-Theanine XYMOGEN 100
Thea-Zen HBC Protocols 100
L-Theanine 100 mg
L-Theanine 100 mg Newflower Farmers Markets 100
L-Theanine 200 mg Vitamin World 100
View all L Theanine products →
L Theanine research & evidence Best L Theanine rankings All L Theanine products More from Exchange Select View on NIH DSLD →