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Windmill D3 Cholecalciferol 50 mcg supplement bottle
Windmill

D3 Cholecalciferol 50 mcg Review

What We Researched
1 active ingredient analyzed · 5 inactive ingredients decoded · 2 brand certifications checked · Page generated: Sep 2026
100
Product Score Excellent
83
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
Vitamin D (as Cholecalciferol) 50 mcg 250%
Bioavailability Excellent

Absorption Rating

  • Vitamin D (as Cholecalciferol) Good
Other Ingredients Excellent

Fillers & Additives

  • Soybean Oil
  • Gelatin
  • Glycerin
  • Corn Oil
  • Water
Efficacy Excellent

Dosage Analysis

  • Vitamin D (as Cholecalciferol) 50 mcg Effective

Supplement Facts

Ingredient Amount % Daily Value
Vitamin D (as Cholecalciferol) 50 mcg 250%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Soybean Oil Safe

Dissolves fat-soluble ingredients. Contains soy allergen.

Gelatin Safe

Forms the capsule shell that holds the supplement contents.

Glycerin Safe

Retains moisture and helps dissolve ingredients in softgels and liquids.

Corn Oil Generally_safe

It is used as a carrier oil or emollient.

Water Safe

Dissolves and carries water-soluble ingredients.

Brand Trust Report
Windmill

Founded 1972 · West Caldwell, New Jersey, United States · 302 products · windmillvitamins.com/

Certifications

2 certifications
Fda Gmp Inspections Source available Primary evidence
NSF Certified Supporting evidence unavailable

Transparency

4 claims
Third Party Testing Claim — Verified Evidence available Evidence
In House Testing — Verified Evidence available Evidence
Testing Lab Disclosure — True Brand claim; evidence unavailable

Violation History

4 incidents
Prop 65 Lead2024-11-15 Source available Primary source
Prop 65 Lead and Cadmium2018-10-01 Source available Primary source
Lawsuit Deceptive packaging with excessive empty space (slack-fill) in their Super Greens product containers.2018 Source available Primary source
Fda Warning Violations of Current Good Manufacturing Practices (cGMP) and making drug claims for several of their supplement products.2014-10-07 Source available Primary source
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Frequently Asked Questions
Is Windmill D3 Cholecalciferol 50 mcg a good supplement?

Windmill D3 Cholecalciferol 50 mcg 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 with 100 servings per container. All 5 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 83/100.

What are the ingredients in Windmill D3 Cholecalciferol 50 mcg?

Windmill D3 Cholecalciferol 50 mcg contains 1 active ingredients: Vitamin D (as Cholecalciferol) (50 mcg). Notable high-dose ingredients include Vitamin D at 250% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Windmill D3 Cholecalciferol 50 mcg safe to take?

GoodSupp reviewed the inactive-ingredient data available for Windmill D3 Cholecalciferol 50 mcg. All 5 inactive ingredients — including capsule materials, fillers, and binders — are currently classified as safe in GoodSupp's ingredient reference data. 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 Windmill a trustworthy supplement brand?

Windmill receives a brand trust score of 83/100 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 302 products in their lineup. 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 — 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.