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Theanine 200 mg

product on market Capsule ProCaps Laboratories 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

L-theanine is supported by strong evidence for its ability to promote relaxation and reduce stress without causing sedation. Research indicates it may improve cognitive focus when paired with caffeine. This ingredient profile is generally recognized as safe for consumption.

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

Label

Product Label

Label for Theanine 200 mg
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Capsule(s)
Serving Size
360
Servings
Non-Nutrient/Non-Botanical
Product Type
100%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

200 mg
Market median: 200.0mg (358 products) 9 studies (A:0, B:2)

Other Ingredients

Gelatin
Claims

Label Claims — Verification

Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Suggested Use Consume one capsule daily. You can increase your intake as required or as guided by your physician.

Formulation Notes

Since 1979, Unsurpassed Purity, Quality and Efficacy. 100% Solar Production Zero-Carbon Footprint

100% Solar Calm Relaxed Focus – Naturally

200 mg of Soothing Theanine

Theanine provides 200 mg of pure theanine – one of the most uniquely beneficial and unusual of amino acids. First of all, unlike other amino acids, theanine is not a building block of protein, but is almost exclusively found in the tea plant (Camellia sinensis) where it accounts for both its distinctive flavor, as well as its unique calming properties. Plus, because theanine can cross the blood brain barrier, it can deliver its beneficial properties directly to the brain and nervous system. Theanine has been shown to enhance alpha brain-wave activity, which is associated with a relaxed, but still focused and alert state. Theanine promotes the production of the neurotransmitters dopamine and serotonin, which support relaxation and calm. The observation that the caffeine in green tea is less intense than that of coffee results from green tea’s abundance of theanine. In fact, theanine is often used to reduce the uncomfortable effects of caffeine and to support a relaxed state. Theanine can also help to diminish perceived stress and tension while promoting calm attention and focus. In short, Theanine naturally supports the brain and its neurotransmitters promoting calm, relaxed focus without drowsiness.

Contains no additives or common allergens Contains no Milk, soy, yeast, corn, wheat, gluten, sodium, salt, sugar, fat, cholesterol, color, preservative, common allergens, genetically modified (GMO) ingredients or manufacturing additives.

Additional Information

For questions about the use of this product call 800.800.1200.

Questions? Reorders? 800.800.1200 www.ProCaps.com

Andrew Lessman

Metadata

Product Details

UPC / SKU687198
DSLD Entry Date2024-11-22
Product TypeNon-Nutrient/Non-Botanical
FormCapsule
DSLD ID320283
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.