Windmill Chewable Calcium 500 mg with Vitamin D3 supplement bottle
Windmill

Chewable Calcium 500 mg with Vitamin D3 Review

What We Researched
2 active ingredients analyzed · 9 inactive ingredients decoded · 2 brand certifications checked · Last updated: Aug 2026
93
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) 15 mcg 75%
Calcium (as Calcium Carbonate) 500 mg 38%
Bioavailability Very Good

Absorption Rating

  • Vitamin D (as Cholecalciferol) Good
  • Calcium (as Calcium Carbonate) Fair
Other Ingredients Excellent

Fillers & Additives

  • Sorbitol
  • Sugar
  • Sucrose
  • Dextrose
  • Magnesium Stearate
  • Natural Flavors
  • Stearic Acid
  • Mannitol
  • Silica
Efficacy Excellent

Dosage Analysis

  • Vitamin D (as Cholecalciferol) 15 mcg Effective
  • Calcium (as Calcium Carbonate) 500 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Vitamin D (as Cholecalciferol) 15 mcg 75%
Calcium (as Calcium Carbonate) 500 mg 38%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Sorbitol Safe

Provides sweetness and helps retain moisture in chewables.

Sugar Generally_safe

Adds sweetness to chewable or gummy supplements.

Sucrose Generally_safe

It is used as a sweetener.

Dextrose Generally_safe

It is used as a filler, sweetener, or to improve the flow of powders.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Natural Flavors Safe

Improves taste of chewable, gummy, or liquid supplements.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Mannitol Generally_safe

It is used as a sweetener, filler, and flow agent.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Brand Trust Report
Windmill

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

Certifications

2 certifications
Fda Gmp Inspections Verified Source
NSF Certified Verified

Transparency

4 claims
Third Party Testing Claim — Verified Source
In House Testing — Verified Source
Testing Lab Disclosure — True

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 Chewable Calcium 500 mg with Vitamin D3 a good supplement?

Windmill Chewable Calcium 500 mg with Vitamin D3 received a product quality score of 93/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 2 active ingredients with 60 servings per container. Of the 9 inactive ingredients, 5 are rated safe and 0 are flagged for review. The manufacturer, Windmill, holds a brand trust score of 83/100 with 2 verified certifications including Fda Gmp Inspections, NSF Certified.

What are the ingredients in Windmill Chewable Calcium 500 mg with Vitamin D3?

Windmill Chewable Calcium 500 mg with Vitamin D3 contains 2 active ingredients: Vitamin D (as Cholecalciferol) (15 mcg), Calcium (as Calcium Carbonate) (500 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Windmill Chewable Calcium 500 mg with Vitamin D3 safe to take?

Windmill Chewable Calcium 500 mg with Vitamin D3 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 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. They hold 2 verified certifications including Fda Gmp Inspections, NSF Certified. 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.

What is magnesium good for?

Magnesium Good For is a topic many supplement consumers ask about. In the context of dietary supplements, understanding magnesium good for helps you make more informed choices about what you put in your body. The quality and form of ingredients matters significantly — two products listing the same ingredient can differ dramatically in bioavailability and effectiveness. GoodSupp analyzes over 150,000 supplement products to help consumers understand exactly what's in their supplements and whether the formulation meets quality standards.

How much magnesium per day?

The optimal dosage depends on your individual health needs, age, sex, and current nutrient levels. Recommended daily amounts are established by health authorities but may vary from therapeutic doses used in clinical research. It's important to check the Supplement Facts label for the exact amount per serving and compare it against the % Daily Value. Some supplements provide mega-doses well above the Daily Value, which may not be necessary and in some cases could be harmful — particularly for fat-soluble vitamins (A, D, E, K) that accumulate in the body. GoodSupp's efficacy analysis evaluates whether a product's dosages align with clinically studied amounts. Always consult your healthcare provider for personalized dosage recommendations.

What is zinc good for?

Zinc Good For is a topic many supplement consumers ask about. In the context of dietary supplements, understanding zinc good for helps you make more informed choices about what you put in your body. The quality and form of ingredients matters significantly — two products listing the same ingredient can differ dramatically in bioavailability and effectiveness. GoodSupp analyzes over 150,000 supplement products to help consumers understand exactly what's in their supplements and whether the formulation meets quality standards.

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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.