Nutrex Research L-Carnitine 1000 supplement bottle
Nutrex Research

L-Carnitine 1000 Review

What We Researched
1 active ingredient analyzed · 4 inactive ingredients decoded · 1 brand certification checked · Last updated: Aug 2026
100
Product Score Excellent
69
Brand Score Fair

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-Carnitine L-Tartrate (Yielding 1000 mg of Pure L-Carnitine) —
Bioavailability Excellent

Absorption Rating

  • L-Carnitine L-Tartrate (Yielding Good
Other Ingredients Excellent

Fillers & Additives

  • Vegetable Capsule
  • Silicon Dioxide
  • Magnesium Stearate
  • Microcrystalline Cellulose
Efficacy Excellent

Dosage Analysis

  • L-Carnitine L-Tartrate (Yielding 1000 mg of Pure L-Carnitine) Effective

Supplement Facts

Ingredient Amount % Daily Value
L-Carnitine L-Tartrate (Yielding 1000 mg of Pure L-Carnitine)

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Vegetable Capsule Safe

It is used as a vegetarian alternative to gelatin capsules.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Microcrystalline Cellulose Safe

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

Brand Trust Report
Nutrex Research

Founded 2002 · Oviedo, Florida, United States · 230 products · nutrex.com/

Certifications

1 certification
Consumerlab Verified Source

Transparency

3 claims
Third Party Testing Claim — Claimed Source
In House Testing — Claimed Source

Violation History

6 incidents
Prop 65 Lead, Cadmium2017-06-27Source
Prop 65 Lead2015-06-15Source
Fda Warning The product Adipodex was found to contain DMBA (1,3-Dimethylbutylamine), which the FDA considered a new dietary ingredient for which a New Dietary Ingredient notification was not submitted.2015-04-24Source
Fda Warning Products including Hemo Rage Black and Lipo-6 Black contained DMAA (1,3-dimethylamylamine), which the FDA deemed an adulterant.2012-04-24Source
Lawsuit A class-action lawsuit was filed against Nutrex Research for products containing the stimulant DMAA, which was alleged to be dangerous.2012Source
Lawsuit A potential class-action lawsuit claimed that Nutrex supplements advertised as 'all-natural' contained methylsynephrine, an ingredient alleged to be the prescription drug Oxilofrine.2010Source
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Frequently Asked Questions
Is Nutrex Research L-Carnitine 1000 a good supplement?

Nutrex Research L-Carnitine 1000 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, Nutrex Research, holds a brand trust score of 69/100 with 1 verified certifications including Consumerlab.

What are the ingredients in Nutrex Research L-Carnitine 1000?

Nutrex Research L-Carnitine 1000 contains 1 active ingredients: L-Carnitine L-Tartrate (Yielding (1000 mg of Pure L-Carnitine)). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Nutrex Research L-Carnitine 1000 safe to take?

Nutrex Research L-Carnitine 1000 has been analyzed for ingredient safety across all its components. All 4 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 Nutrex Research a trustworthy supplement brand?

Nutrex Research receives a brand trust score of 69/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 2002 and headquartered in Oviedo, Florida, United States, the company offers 230 products in their lineup. They hold 1 verified certifications including Consumerlab. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Nutrex Research has 6 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.