Thorne - Theanine

Suppie Report

Thorne

Theanine

A grade
88/100
SUPPIE SCORE
82/100
EFFICACY
High
SAFETY
92/100
CLEANLINESS

What Does Theanine Do?

Thorne L-Theanine offers a research-backed 200mg dose of pure Suntheanine for effective stress reduction, relaxation, and sleep support. The formulation is clean and safe for healthy adults, with minimal risks and no allergens, though pregnant individuals should consult a doctor.
What are the main benefits of L-Theanine for stress and relaxation?
How does the 200mg dosage in Thorne Theanine compare to research-backed amounts?
Can L-Theanine improve sleep quality, and what evidence supports this?
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What Are the Benefits of Theanine?

Based on proven scientific research

Stress ReductionStrong
Improved Sleep QualityModerate
Enhanced FocusModerate
Mood SupportModerate
RelaxationStrong

Good For:

What Are the Side Effects of Thorne Theanine?

Always consult your health practitioner if in doubt.

RiskLow Risk

Overview

•L-Theanine at 200mg is well within safe daily limits (up to 900mg shown safe in studies), with no significant adverse effects reported in healthy adults.
•Potential mild side effects include headache or drowsiness, but these are rare at this dosage and formulation.
•May interact with blood pressure medications by enhancing hypotensive effects or with sedatives like benzodiazepines, increasing drowsiness.
•Consult healthcare provider if pregnant, as safety data is limited; contraindicated in hypersensitivity to ingredients.
•No allergens present; vegetarian capsule suitable for most, with low risk of contamination due to Thorne's quality standards.
•Long-term use appears safe based on available evidence, but monitor for any individual sensitivities.

Potential Side Effects

Negative Interactions

Inactive Ingredients

Calcium laurate
Low Risk
Hypromellose (derived from cellulose)
Low Risk
Leucine
Low Risk
Microcrystalline cellulose
Low Risk

What Are the Ingredients in Thorne Theanine?

L-Theanine
200mg
Calcium Laurate
Hypromellose (derived from cellulose)
Leucine
Microcrystalline Cellulose

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Dosage & Bioavailability

How the active doses and forms in Theanine compare to the research.

•L-Theanine — 200 mg per serving; studies use 100 mg/day. Above studied amounts is not the same as unsafe.

Sources & References

L theanine what is it
Information from ro.co
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Are hypromellose capsules safe
Information from www.meskajoinway.com
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What does l theanine do
Information from www.baptisthealth.com
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Theanine uses and risks
Information from www.webmd.com
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Www.thorne.com
Information from www.thorne.com
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NCT04749745
Information from clinicaltrials.gov
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Www.thorne.com
Information from www.thorne.com
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PMC11616108
Information from pmc.ncbi.nlm.nih.gov
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Article
Information from www.thorne.com
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L theanine
Information from www.mskcc.org
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Sleep aids
Information from sleepdoctor.com
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Theanine
Information from www.webmd.com
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L theanine
Information from health.clevelandclinic.org
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S1087079225000292
Information from www.sciencedirect.com
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Article
Information from www.thorne.com
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Hpmc capsules why they are gaining popularity in the supplement industry
Information from adragos-pharma.com
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S0271531724001684
Information from www.sciencedirect.com
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Dp
Information from www.thorne.com
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Supplements
Information from examine.com
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1028415X.2025.2556925
Information from www.tandfonline.com
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Dp
Information from www.thorne.com
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L Theanine Cognitive Vitality For Researchers.pdf
Information from www.alzdiscovery.org
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Product
Information from www.carewell.com
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Dp
Information from www.thorne.com
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703077 HYDROXYPROPYL METHYLCELLULOSE
Information from www.ewg.org
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Article
Information from www.thorne.com
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By ingredient
Information from www.thorne.com
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Theanine
Information from www.thorne.com
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41227106
Information from pubmed.ncbi.nlm.nih.gov
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L theanine.html
Information from www.drugs.com
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7710
Information from www.mdpi.com
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L theanine
Information from www.healthline.com
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PMC6836118
Information from pmc.ncbi.nlm.nih.gov
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Download
Information from www.fda.gov
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Frequently Asked Questions

Common questions about Thorne Theanine