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Nature's Bounty L-Carnitine 500 mg supplement bottle
Nature's Bounty

L-Carnitine 500 mg Review

What We Researched
1 active ingredient analyzed · 8 inactive ingredients decoded · 7 brand certifications checked · Page generated: Sep 2026
98
Product Score Excellent
100
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-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

  • Polyethylene Glycol Low
  • Magnesium Silicate
  • Polyvinyl Alcohol
  • Calcium Carbonate
  • Vegetable Magnesium Stearate
  • Vegetable Cellulose
  • Vegetable Stearic Acid
  • 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.

Polyethylene Glycol Caution

It is used as a binder, coating agent, or to improve solubility.

Magnesium Silicate Generally_safe

It is used to improve powder flow and prevent clumping.

Polyvinyl Alcohol Generally_safe

It is used as a coating for tablets or capsules.

Calcium Carbonate Safe

Acts as a filler and provides supplemental calcium.

Vegetable Magnesium Stearate Safe

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

Vegetable Cellulose Safe

Forms a vegetarian capsule shell alternative to gelatin.

Vegetable Stearic Acid Generally_safe

It is used to prevent ingredients from sticking to manufacturing equipment.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Brand Trust Report
Nature's Bounty

Founded 1971 · Ronkonkoma, New York, USA · 712 products · naturesbounty.com

Certifications

7 certifications
Clean Label Project Source available Primary evidence
Health Canada Licensed Source available Primary evidence
Labdoor Source available Primary evidence
Usda Organic Source available Primary evidence
Consumerlab Verified evidence Primary evidence
Fda Gmp Inspections Source available Primary evidence
USP Verified Supporting evidence unavailable

Transparency

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

Violation History

5 incidents
Lawsuit Falsely advertising heart health benefits of fish oil supplements.2025 Source checked Primary source
Lawsuit Deceptive use of Amazon reviews ('review hijacking') to promote products.2024 Source checked Primary source
Recall Nature's Bounty Kids Multivitamin Gummies2023-06-02 Source available Primary source
Prop 65 Lead2023-03-28 Source available Primary source
Lawsuit Falsely advertising 'fish oil' supplements that are a synthetic omega-3 product.2023 Source checked Primary source
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Frequently Asked Questions
Is Nature's Bounty L-Carnitine 500 mg a good supplement?

Nature's Bounty L-Carnitine 500 mg received a product quality score of 98/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 1 active ingredients Of the 8 inactive ingredients, 7 are rated safe and 1 ingredient is flagged for review. The manufacturer, Nature's Bounty, holds a brand trust score of 100/100 with 1 verified certifications including Consumerlab.

What are the ingredients in Nature's Bounty L-Carnitine 500 mg?

Nature's Bounty 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 Nature's Bounty L-Carnitine 500 mg safe to take?

GoodSupp reviewed the inactive-ingredient data available for Nature's Bounty L-Carnitine 500 mg. Of 8 inactive ingredients, 7 are rated safe. 1 ingredient is flagged for review: Polyethylene Glycol. 'Caution' doesn't mean dangerous — it indicates the ingredient has some considerations worth being aware of, such as potential sensitivities or ongoing research. 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 Nature's Bounty a trustworthy supplement brand?

Nature's Bounty receives a brand trust score of 100/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1971 and headquartered in Ronkonkoma, New York, USA, the company offers 712 products in their lineup. They hold 1 verified certifications including Consumerlab. The linked records document particular certification scopes; they do not prove that every product or batch was independently tested for contents, purity, or effectiveness. Note: Nature's Bounty 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.