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Low Dose Caffeine & Theanine

product on market Capsule VitaMonk Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 67% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

AI-generated · Qwen 3.6 · methodology

Caffeine and L-theanine are supported by strong evidence for enhancing alertness and cognitive performance while mitigating jitteriness. Theobromine provides a milder stimulant effect compared to caffeine. Together, these ingredients are well-documented for promoting focused energy and mental clarity.

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

Label

Product Label

Label for Low Dose Caffeine & Theanine
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Capsule(s)
Serving Size
60
Servings
Non-Nutrient/Non-Botanical
Product Type
67%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

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

Other Ingredients

Hypromellose L-Leucine
Claims

Label Claims — Verification

Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Directions: As a dietary supplement, take one capsule every four to five hours depending on your energy needs or as directed by your healthcare provider.

Warnings & Precautions

Do not exceed four capsules within a 24 hour period.

Warning: For adults only.

Consult your healthcare provider before using this or any product if you are pregnant or nursing, taking medication, or have a medical condition.

Do not exceed more than 400mg of caffeine from any source within a 24 hour period. Do not take this product if you are sensitive to caffeine.

Keep out of reach of children.

Do not use if safety seal is damaged or missing.

Formulation Notes

Promotes calm energy and focus with none of the jitters

Additional Information

Store in a cool, dry place.

To get 15% off your next purchase, visit www.vitamonk.com/thanks

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Metadata

Product Details

UPC / SKUX003NWLC6J
DSLD Entry Date2023-11-22
Product TypeNon-Nutrient/Non-Botanical
FormCapsule
DSLD ID304716
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
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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.