Windmill Biotin 5,000 mcg supplement bottle
Windmill

Biotin 5,000 mcg

What We Researched
2 active ingredients analyzed · 6 inactive ingredients decoded · 1 brand certification checked · 2 retailers compared · Last updated: Mar 2026
81
Product Score Good
74
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Biotin 5000 mcg 16667%
Calcium (as Dicalcium Phosphate) 30 mg 2%
Bioavailability Very Good

Absorption Rating

  • Biotin Good
  • Calcium (as Dicalcium Phosphate) Fair
Other Ingredients Excellent

Fillers & Additives

  • Dicalcium Phosphate
  • Microcrystalline Cellulose
  • Stearic Acid
  • Croscarmellose Sodium
  • Silica
  • Magnesium Stearate
Efficacy Fair

Dosage Analysis

  • Biotin 5000 mcg Effective
  • Calcium (as Dicalcium Phosphate) 30 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Biotin 5000 mcg 16667%
Calcium (as Dicalcium Phosphate) 30 mg 2%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Dicalcium Phosphate Safe

Serves as both a filler and a supplemental source of calcium and phosphorus.

Microcrystalline Cellulose Safe

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

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$14$13$12$11$10 $11.87
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 Biotin 5,000 mcg a good supplement?

Windmill Biotin 5,000 mcg received a product quality score of 81/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 2 active ingredients with 60 servings per container. All 6 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 Biotin 5,000 mcg?

Windmill Biotin 5,000 mcg contains 2 active ingredients: Biotin (5000 mcg), Calcium (as Dicalcium Phosphate) (30 mg). Notable high-dose ingredients include Biotin at 16667% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Windmill Biotin 5,000 mcg safe to take?

Windmill Biotin 5,000 mcg has been analyzed for ingredient safety across all its components. All 6 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.

How much vitamin d3 should i take daily?

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 does vitamin d do?

This is an important question for supplement consumers. The dietary supplement industry is largely self-regulated, which means product quality, ingredient transparency, and safety practices vary significantly between brands and products. The most reliable way to evaluate any supplement is to check for third-party testing certifications, review the full ingredient list and dosages, and research the brand's regulatory track record. GoodSupp's database of over 250,000 analyzed products provides independent quality scores, ingredient safety ratings, and brand trust reports to help you make evidence-based decisions.

How much vitamin d3 per day for a woman?

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.

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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.