L-Theanine 200 mg

product on market Capsule Health Thru Nutrition Naturally 🟢 Safety: 100/100
Brand: Health Thru Nutrition Naturally
🟢 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 Vege Capsule(s) Serving Size
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

Hypromellose Microcrystalline Cellulose Magnesium Stearate Silicon Dioxide

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) Dairy Free

Product Information

📋 Directions for Use

Directions: Adults: Take one (1) vege capsule daily as a dietary supplement or as recommended by your healthcare professional.

⚠️ Warnings & Precautions

Caution: Before using any dietary supplement, pregnant or lactating women should consult with a physician or health professional.

Keep out of reach of children.

Do not use if safety seal is broken or missing.

🧪 Formulation Notes

Free Of: Milk or milk by-products, egg or egg by-products, fish or fish by-products, shellfish or shellfish by-products, tree nuts, wheat or wheat by-products, peanuts or peanut by-products and soybeans or soy by-products.

PhytoSure Certified 200 mg

Non GMO

Additional Information

To report a serious adverse event or to obtain product information contact 1-866-319-6299.

Manufactured in a cGMP Certified U.S.A. Facility.

HTN0807 R0717

Promotes a healthy calming effect Provides mood enhancing support

Non GMO

PhytoSure 100% plant guaranteed Validated Authenticated Certified

GMP Quality Assured

Product Details

UPC / SKU 8 19193 02080 7
DSLD Entry Date 2018-07-25
Product Type Non-Nutrient/Non-Botanical
Form Capsule
Brand Health Thru Nutrition Naturally
DSLD ID 177784
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 Health Thru Nutrition Naturally View on NIH DSLD →