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Caffeine 100 mg with L-Theanine 100 mg

product on market Capsule Nutricost 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

Caffeine and L-theanine are combined to enhance alertness and cognitive focus. Strong evidence suggests that L-theanine may mitigate the jittery effects of caffeine while maintaining mental clarity. This combination is widely researched for improving attention and reaction time.

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

Label

Product Label

Label for Caffeine 100 mg with L-Theanine 100 mg
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Capsule(s)
Serving Size
240
Servings
Non-Nutrient/Non-Botanical
Product Type
100%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Market median: 180.0mg (239 products) 49 studies (A:1, B:19)
100 mg
Market median: 200.0mg (358 products) 9 studies (A:0, B:2)

Other Ingredients

Rice Flour Gelatin Microcrystalline Cellulose Magnesium Stearate Silica
Claims

Label Claims — Verification

Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Suggested use: As a dietary supplement, take 1 capsule daily with 8-12 oz of water or as directed by your healthcare professional.

Warnings & Precautions

Do not consume more than 400 mg of caffeine from any source in a 24 hour period. Too much caffeine may cause nervousness, irritability, sleeplessness, and occasional rapid heart rates. In case of accidental overdose, seek professional assistance or contact a poison control center immediately.

Warning: For healthy individuals 18 years and older.

Consult a healthcare professional prior to use if you are pregnant or nursing, taking medication, or have a medical condition.

Keep out of reach of children.

Do not use if safety seal is broken or missing.

Formulation Notes

The recommended dose of this product contains as much caffeine as about 1 cup of coffee.

Third party tested

Non-GMO Gluten-Free

Made and quality tested in the USA with globally sourced ingredients.

100mg caffeine per serving 100mg L-Theanine per serving

Non-GMO Product

Additional Information

Notice: Store in a cool, dry place.

Nutricoat Quality Guaranteed GMP GMP Compliant Facility

Metadata

Product Details

UPC / SKU8 10014 67193 2
DSLD Entry Date2025-02-23
Product TypeNon-Nutrient/Non-Botanical
FormCapsule
BrandNutricost
DSLD ID328480
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 →
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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.