Everyday Health L-Theanine 300 supplement bottle
Everyday Health

L-Theanine 300 Review

What We Researched
1 active ingredient analyzed · 2 inactive ingredients decoded · Last updated: Aug 2026
100
Product Score Excellent
Brand Score Not rated yet

Product score from label analysis. Everyday Health hasn't completed our brand research yet. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
L-Theanine 300 mg
Bioavailability Excellent

Absorption Rating

  • L-Theanine Good
Other Ingredients Excellent

Fillers & Additives

  • Magnesium Stearate
  • Gelatin
Efficacy Excellent

Dosage Analysis

  • L-Theanine 300 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
L-Theanine 300 mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Gelatin Safe

Forms the capsule shell that holds the supplement contents.

Brand Trust Report
Everyday Health

Founded 2002 · New York, New York, USA · 68 products · everydayhealth.com

Transparency

1 claim
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Frequently Asked Questions
Is Everyday Health L-Theanine 300 a good supplement?

Everyday Health L-Theanine 300 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 90 servings per container. All 2 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives.

What are the ingredients in Everyday Health L-Theanine 300?

Everyday Health L-Theanine 300 contains 1 active ingredients: L-Theanine (300 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Everyday Health L-Theanine 300 safe to take?

Everyday Health L-Theanine 300 has been analyzed for ingredient safety across all its components. All 2 inactive ingredients — including capsule materials, fillers, and binders — are rated safe based on regulatory data and published safety research. This is a clean formulation with no controversial additives. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

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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.