Windmill L-Carnitine 250 mg supplement bottle
Windmill

L-Carnitine 250 mg

What We Researched
3 active ingredients analyzed · 4 inactive ingredients decoded · 1 brand certification checked · 2 retailers compared · Last updated: Mar 2026
62
Product Score Fair
74
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Calcium (as Tricalcium Phosphate) 110 mg 8%
Phosphorus (as Tricalcium Phosphate) 55 mg 4%
L-Carnitine (as L-Carnitine-L-Tartrate) 250 mg
Bioavailability Fair

Absorption Rating

  • Calcium (as Tricalcium Phosphate) Fair
  • Phosphorus (as Tricalcium Phosphate) Good
  • L-Carnitine (as L-Carnitine-L-Tartrate) Poor
Other Ingredients Excellent

Fillers & Additives

  • Bovine Gelatin
  • Microcrystalline Cellulose
  • Magnesium Stearate
  • Silica
Efficacy Very Poor

Dosage Analysis

  • Calcium (as Tricalcium Phosphate) 110 mg Under-dosed
  • Phosphorus (as Tricalcium Phosphate) 55 mg Under-dosed
  • L-Carnitine (as L-Carnitine-L-Tartrate) 250 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Calcium (as Tricalcium Phosphate) 110 mg 8%
Phosphorus (as Tricalcium Phosphate) 55 mg 4%
L-Carnitine (as L-Carnitine-L-Tartrate) 250 mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Bovine Gelatin Safe

Forms capsule shells. Sourced from bovine (cow) collagen.

Microcrystalline Cellulose Safe

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

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$16$15$14$13$12 $13.66
Target

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

Brand Trust Report
Windmill

Founded 1972 · West Caldwell, New Jersey, United States · 150 products · windmillvitamins.com/

Certifications

1 certification
Fda Gmp Inspections Verified Source

Transparency

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

Violation History

4 incidents
Prop 65 Lead2024-11-15Source
Prop 65 Lead and Cadmium2018-10-01Source
Lawsuit Deceptive packaging with excessive empty space (slack-fill) in their Super Greens product containers.2018Source
Fda Warning Violations of Current Good Manufacturing Practices (cGMP) and making drug claims for several of their supplement products.2014-10-07Source
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Frequently Asked Questions
Is Windmill L-Carnitine 250 mg a good supplement?

Windmill 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 3 active ingredients with 50 servings per container. All 4 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Windmill, holds a brand trust score of 74/100 with 1 verified certifications including Fda Gmp Inspections.

What are the ingredients in Windmill L-Carnitine 250 mg?

Windmill L-Carnitine 250 mg contains 3 active ingredients: Calcium (as Tricalcium Phosphate) (110 mg), Phosphorus (as Tricalcium Phosphate) (55 mg), L-Carnitine (as L-Carnitine-L-Tartrate) (250 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Windmill L-Carnitine 250 mg safe to take?

Windmill L-Carnitine 250 mg 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 Windmill a trustworthy supplement brand?

Windmill receives a brand trust score of 74/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1972 and headquartered in West Caldwell, New Jersey, United States, the company offers 150 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. Note: Windmill has 4 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. 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.