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Thorne Theanine 200 mg supplement bottle
Thorne

Theanine 200 mg Review

What We Researched
1 active ingredient analyzed · 4 inactive ingredients decoded · 10 brand certifications checked · Page generated: Sep 2026
100
Product Score Excellent
98
Brand Score Excellent

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
L-Theanine† 200 mg *
Bioavailability Excellent

Absorption Rating

  • L-Theanine† Good
Other Ingredients Excellent

Fillers & Additives

  • Hypromellose (Derived from Cellulose) Capsule
  • Leucine
  • Calcium Laurate
  • Microcrystalline Cellulose
Efficacy Excellent

Dosage Analysis

  • L-Theanine† 200 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
L-Theanine† 200 mg *

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Hypromellose (Derived from Cellulose) Capsule Safe

It is used to encapsulate supplement ingredients.

Leucine Safe

It is used for its potential muscle-building and recovery benefits.

Calcium Laurate Generally_safe

It helps to bind ingredients together and prevent separation.

Microcrystalline Cellulose Safe

Adds bulk to small-dose supplements to make tablets/capsules a manageable size.

Brand Trust Report
Thorne

Founded 1984 · New York, NY, United States · 204 products · thorne.com

Certifications

10 certifications
Nsf Certified For Sport Source available Primary evidence
Nsf Gmp Source available Primary evidence
Fda Gmp Inspections Source available Primary evidence
NSF Certified for Sport Supporting evidence unavailable
NSF Contents Certified Supporting evidence unavailable
Informed Choice Supporting evidence unavailable
Informed Sport Supporting evidence unavailable
Eurofins Certified Supplement Supporting evidence unavailable
Eurofins Clean Sport Supporting evidence unavailable
NSF Certified Supporting evidence unavailable

Transparency

4 claims
Third Party Testing Claim — Verified Evidence available Evidence
Testing Lab Disclosure — Verified Evidence available Evidence
In House Testing — Verified Evidence available Evidence

Violation History

2 incidents
Recall Captomer, Captomer-2502014-06-12 Source available Primary source
Prop 65 Lead2013-12-13 Source available Primary source
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Frequently Asked Questions
Is Thorne Theanine 200 mg a good supplement?

Thorne Theanine 200 mg received a product quality score of 100/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 1 active ingredients All 4 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Thorne, holds a brand trust score of 98/100.

What are the ingredients in Thorne Theanine 200 mg?

Thorne Theanine 200 mg contains 1 active ingredients: L-Theanine† (200 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Thorne Theanine 200 mg safe to take?

GoodSupp reviewed the inactive-ingredient data available for Thorne Theanine 200 mg. All 4 inactive ingredients — including capsule materials, fillers, and binders — are currently classified as safe in GoodSupp's ingredient reference data. This label analysis cannot determine whether the product is safe for a particular person, and source labels may change. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Thorne a trustworthy supplement brand?

Thorne receives a brand trust score of 98/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1984 and headquartered in New York, NY, United States, the company offers 204 products in their lineup. Note: Thorne has 2 historical regulatory incidents on record, which are factored into the trust score.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records — read our methodology. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.