Windmill Sustained Release C1000 Ascorbic Acid supplement bottle
Windmill

Sustained Release C1000 Ascorbic Acid

What We Researched
1 active ingredient analyzed · 11 inactive ingredients decoded · 1 brand certification checked · 2 retailers compared · Last updated: Mar 2026
75
Product Score Fair
74
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin C (as Ascorbic Acid) 1000 mg 1111%
Bioavailability Fair

Absorption Rating

  • Vitamin C (as Ascorbic Acid) Fair
Other Ingredients Good

Fillers & Additives

  • Stearic Acid
  • Silica
  • Dicalcium Phosphate
  • Microcrystalline Cellulose
  • Magnesium Stearate
  • Methylcellulose
  • Stearin
  • Methylcellulose
  • Glycerin
  • Carnauba Wax
  • Talc High
Efficacy Excellent

Dosage Analysis

  • Vitamin C (as Ascorbic Acid) 1000 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Vitamin C (as Ascorbic Acid) 1000 mg 1111%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

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.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Methylcellulose Generally_safe

It is used as a thickener or binder.

Stearin Unknown
Methylcellulose Generally_safe

It is used as a thickener or binder.

Glycerin Safe

Retains moisture and helps dissolve ingredients in softgels and liquids.

Carnauba Wax Safe

Provides a glossy, protective coating on tablets.

Talc Avoid

It is used to improve powder flow and prevent clumping.

Price Comparison

Target $15.09 $0.15 / serving
Best Price

Price History

Tracked across major retailers. Updated periodically.

$17$16$15$14$13 $15.09
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 Sustained Release C1000 Ascorbic Acid a good supplement?

Windmill Sustained Release C1000 Ascorbic Acid received a product quality score of 75/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 1 active ingredients with 100 servings per container. Of the 11 inactive ingredients, 7 are rated safe and 0 are flagged for review. 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 Sustained Release C1000 Ascorbic Acid?

Windmill Sustained Release C1000 Ascorbic Acid contains 1 active ingredients: Vitamin C (as Ascorbic Acid) (1000 mg). Notable high-dose ingredients include Vitamin C at 1111% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Windmill Sustained Release C1000 Ascorbic Acid safe to take?

Windmill Sustained Release C1000 Ascorbic Acid 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 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.