Source Naturals L-Carnitine 250 mg supplement bottle
Source Naturals

L-Carnitine 250 mg

What We Researched
1 active ingredient analyzed · 5 inactive ingredients decoded · 1 brand certification checked · 1 retailer compared · Last updated: Mar 2026
62
Product Score Fair
66
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
L-Carnitine (as L-Carnitine Fumarate) 250 mg †
Bioavailability Fair

Absorption Rating

  • L-Carnitine (as L-Carnitine Fumarate) Fair
Other Ingredients Excellent

Fillers & Additives

  • Gelatin
  • Dibasic Calcium Phosphate
  • Silicon Dioxide
  • Colloidal
  • Magnesium Stearate
Efficacy Very Poor

Dosage Analysis

  • L-Carnitine (as L-Carnitine Fumarate) 250 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
L-Carnitine (as L-Carnitine Fumarate) 250 mg †

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Gelatin Safe

Forms the capsule shell that holds the supplement contents.

Dibasic Calcium Phosphate Generally_safe

It is used as a filler and to improve tablet hardness.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Colloidal Unknown
Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Price Comparison

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
Source Naturals

Founded 1982 · Scotts Valley, CA, USA · 837 products · sourcenaturals.com/

Certifications

1 certification
Fda Gmp Inspections Verified Source

Transparency

2 claims
Third Party Testing Claim — Claimed Source
In House Testing — Verified Source
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Frequently Asked Questions
Is Source Naturals L-Carnitine 250 mg a good supplement?

Source Naturals L-Carnitine 250 mg received a product quality score of 62/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 1 active ingredients Of the 5 inactive ingredients, 3 are rated safe and 0 are flagged for review. The manufacturer, Source Naturals, holds a brand trust score of 66/100 with 1 verified certifications including Fda Gmp Inspections.

What are the ingredients in Source Naturals L-Carnitine 250 mg?

Source Naturals L-Carnitine 250 mg contains 1 active ingredients: L-Carnitine (as L-Carnitine Fumarate) (250 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Source Naturals L-Carnitine 250 mg safe to take?

Source Naturals L-Carnitine 250 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 Source Naturals a trustworthy supplement brand?

Source Naturals receives a brand trust score of 66/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1982 and headquartered in Scotts Valley, CA, USA, the company offers 837 products in their lineup. They hold 1 verified certifications including Fda Gmp Inspections. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. No regulatory violations or FDA warning letters were found in our research.

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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. 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.