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Seeking Health L-Theanine 100 mg supplement bottle
Seeking Health

L-Theanine 100 mg Review

What We Researched
1 active ingredient analyzed · 4 inactive ingredients decoded · 5 brand certifications checked · Page generated: Sep 2026
100
Product Score Excellent
84
Brand Score Good

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 100 mg †
Bioavailability Excellent

Absorption Rating

  • L-Theanine Good
Other Ingredients Excellent

Fillers & Additives

  • Cellulose
  • Vegetarian Capsule
  • L-Leucine
  • Silicon Dioxide
Efficacy Excellent

Dosage Analysis

  • L-Theanine 100 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
L-Theanine 100 mg †

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Cellulose Safe

Provides bulk and structure in tablets and capsules.

Vegetarian Capsule Safe

It is used as a vegetarian capsule shell material.

L-Leucine Safe

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

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Brand Trust Report
Seeking Health

Founded 2011 · Bellingham, Washington, USA · 88 products · seekinghealth.com

Certifications

5 certifications
Fda Gmp Inspections Source available Primary evidence
Nsf Gmp Source available Primary evidence
NSF Certified for Sport Supporting evidence unavailable
NSF Contents Certified Supporting evidence unavailable
NSF Certified Supporting evidence unavailable

Transparency

4 claims
Third Party Testing Claim — Verified Evidence available Evidence
Testing Lab Disclosure — Claimed Evidence available Evidence
Contains Proprietary Blend — True Brand claim; evidence unavailable

Violation History

2 incidents
Prop 65 Lead2025-07-11 Source available Primary source
Recall Optimal Multivitamin Chewable Dietary Supplements2022-09-16 Source available Primary source
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Frequently Asked Questions
Is Seeking Health L-Theanine 100 mg a good supplement?

Seeking Health L-Theanine 100 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 with 60 servings per container. All 4 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Seeking Health, holds a brand trust score of 84/100.

What are the ingredients in Seeking Health L-Theanine 100 mg?

Seeking Health L-Theanine 100 mg contains 1 active ingredients: L-Theanine (100 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Seeking Health L-Theanine 100 mg safe to take?

GoodSupp reviewed the inactive-ingredient data available for Seeking Health L-Theanine 100 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 Seeking Health a trustworthy supplement brand?

Seeking Health receives a brand trust score of 84/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 2011 and headquartered in Bellingham, Washington, USA, the company offers 88 products in their lineup. Note: Seeking Health 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.