Sundown L-Carnitine 500 mg supplement bottle
Sundown

L-Carnitine 500 mg Review

What We Researched
1 active ingredient analyzed · 4 inactive ingredients decoded · 3 brand certifications checked · Last updated: Aug 2026
100
Product Score Excellent
81
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-Carnitine (as L-Carnitine L-Tartrate) 500 mg †
Bioavailability Excellent

Absorption Rating

  • L-Carnitine (as L-Carnitine L-Tartrate) Good
Other Ingredients Excellent

Fillers & Additives

  • Vegetable Cellulose
  • Stearic Acid
  • Polyvinyl Alcohol
  • Silica
Efficacy Excellent

Dosage Analysis

  • L-Carnitine (as L-Carnitine L-Tartrate) 500 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
L-Carnitine (as L-Carnitine L-Tartrate) 500 mg †

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Vegetable Cellulose Safe

Forms a vegetarian capsule shell alternative to gelatin.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Polyvinyl Alcohol Generally_safe

It is used as a coating for tablets or capsules.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Brand Trust Report
Sundown

Founded 1977 · Bridgewater, NJ, USA · 359 products · sundownnutrition.com/

Certifications

3 certifications
Consumerlab Verified Source
Nsf Gmp Verified Source
Usda Organic Verified Source

Transparency

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

Violation History

9 incidents
Lawsuit FTC charges of 'review hijacking' on Amazon to mislead consumers.2023Source
Lawsuit Deceptive 'review hijacking' on Amazon to mislead consumers about product ratings and popularity.2023Source
Lawsuit The Bountiful Company, including Sundown Naturals, engaged in 'review hijacking' on Amazon.com to deceive consumers.2023Source
Lawsuit Deceptive labeling of 'Complete' multivitamins that were missing essential B vitamins.2021Source
Lawsuit A class-action lawsuit was filed against Rexall Sundown, Inc., NatureSmart, LLC, and The Bountiful Company for misrepresenting 'Complete' multivitamin gummies that lacked all essential B vitamins.2021Source
Lawsuit Rexall Sundown, Inc. faced a class-action lawsuit for allegedly mislabeling joint health products.2017Source
Recall Rexall Calcium 1200 mg plus 1000IU Vitamin D3, 60 softgels2012-01-16Source
Lawsuit The FTC charged Rexall Sundown, Inc. with making misleading claims about its Cellasene product.2003Source
Lawsuit False and unsubstantiated claims for the 'Cellasene' supplement.2000Source
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Frequently Asked Questions
Is Sundown L-Carnitine 500 mg a good supplement?

Sundown L-Carnitine 500 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 Of the 4 inactive ingredients, 3 are rated safe and 0 are flagged for review. The manufacturer, Sundown, holds a brand trust score of 81/100 with 3 verified certifications including Consumerlab, Nsf Gmp, Usda Organic.

What are the ingredients in Sundown L-Carnitine 500 mg?

Sundown L-Carnitine 500 mg contains 1 active ingredients: L-Carnitine (as L-Carnitine L-Tartrate) (500 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Sundown L-Carnitine 500 mg safe to take?

Sundown L-Carnitine 500 mg has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Sundown a trustworthy supplement brand?

Sundown receives a brand trust score of 81/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1977 and headquartered in Bridgewater, NJ, USA, the company offers 359 products in their lineup. They hold 3 verified certifications including Consumerlab, Nsf Gmp, Usda Organic. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Sundown has 9 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.