Nature's Truth L-Theanine 200 mg supplement bottle
Nature's Truth

L-Theanine 200 mg Review

What We Researched
1 active ingredient analyzed · 5 inactive ingredients decoded · 5 brand certifications checked · Last updated: Aug 2026
100
Product Score Excellent
96
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

  • Gelatin Capsule
  • Cellulose (Plant Origin)
  • Vegetable Magnesium Stearate
  • Rice Powder
  • Silica
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.

Gelatin Capsule Safe

It is used as a material for making capsules.

Cellulose (Plant Origin) Safe

It is used as a filler, binder, or thickener.

Vegetable Magnesium Stearate Safe

Prevents ingredients from sticking to equipment. Derived from vegetable sources.

Rice Powder Safe

It is used as a filler or flow agent.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Brand Trust Report
Nature's Truth

Founded 2014 · Bohemia, NY, United States · 233 products · naturestruth.com/

Certifications

5 certifications
Fda Gmp Inspections Verified Source
Nsf Gmp Verified Source
Usda Organic Verified Source
NSF Contents Certified Verified
Non-GMO Project Verified Verified

Transparency

5 claims
Third Party Testing Claim — Verified Source
Testing Lab Disclosure — Claimed
In House Testing — Verified Source
Contains Proprietary Blend — True

Violation History

5 incidents
Lawsuit Misleading labeling regarding the amount of magnesium in 'CALM GUMMIES Magnesium Supplement'.2024Source
Prop 65 Lead2021-09-13Source
Recall Lavender Body Cream2021-06-17Source
Fda Warning Public health warning against the purchase and consumption of an unregistered food supplement (High Potency Selenium 200mcg).2020-03-05Source
Recall Wintergreen 100% Pure Essential Oil2019-07-03Source
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Frequently Asked Questions
Is Nature's Truth L-Theanine 200 mg a good supplement?

Nature's Truth L-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 with 60 servings per container. All 5 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Nature's Truth, holds a brand trust score of 96/100 with 5 verified certifications including Fda Gmp Inspections, Nsf Gmp, Usda Organic, NSF Contents Certified.

What are the ingredients in Nature's Truth L-Theanine 200 mg?

Nature's Truth L-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 Nature's Truth L-Theanine 200 mg safe to take?

Nature's Truth L-Theanine 200 mg has been analyzed for ingredient safety across all its components. All 5 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.

Is Nature's Truth a trustworthy supplement brand?

Nature's Truth receives a brand trust score of 96/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 2014 and headquartered in Bohemia, NY, United States, the company offers 233 products in their lineup. They hold 5 verified certifications including Fda Gmp Inspections, Nsf Gmp, Usda Organic, NSF Contents Certified. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Nature's Truth has 5 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.