NaturesPlus C-Ascorbs Sustained Release supplement bottle
NaturesPlus

C-Ascorbs Sustained Release

What We Researched
9 active ingredients analyzed · 8 inactive ingredients decoded · 1 retailer compared · Last updated: Mar 2026
76
Product Score Fair
59
Brand Score Poor

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Total Carbohydrates 1 g 1%
Vitamin C (as Ascorbic Acid, Mineral Ascorbates) 4000 mg 4444%
Calcium (as Calcium Ascorbate) 212 mg 16%
Magnesium (as Magnesium Ascorbate) 108 mg 26%
Zinc (as Zinc Ascorbate) 10 mg 91%
Manganese (as Manganese Ascorbate) 0.4 mg 17%
Potassium (as Potassium Ascorbate) 240 mg 5%
Lemon Bioflavonoid Complex 400 mg
Bioavailability Very Good

Absorption Rating

  • Total Carbohydrates Fair
  • Vitamin C (as Ascorbic Acid, Mineral Ascorbates) Fair
  • Calcium (as Calcium Ascorbate) Good
  • Magnesium (as Magnesium Ascorbate) Good
  • Zinc (as Zinc Ascorbate) Fair
  • Manganese (as Manganese Ascorbate) Good
  • Potassium (as Potassium Ascorbate) Good
  • Lemon Bioflavonoid Complex Fair
Other Ingredients Excellent

Fillers & Additives

  • Hydroxypropyl Methylcellulose
  • Stearic Acid
  • Microcrystalline Cellulose
  • Dicalcium Phosphate
  • Rutin
  • Magnesium Stearate
  • Silica
  • Pharmaceutical Glaze
Efficacy Poor

Dosage Analysis

  • Vitamin C (as Ascorbic Acid, Mineral Ascorbates) 4000 mg High
  • Calcium (as Calcium Ascorbate) 212 mg Under-dosed
  • Magnesium (as Magnesium Ascorbate) 108 mg Under-dosed
  • Zinc (as Zinc Ascorbate) 10 mg Effective
  • Manganese (as Manganese Ascorbate) 0.4 mg Under-dosed
  • Potassium (as Potassium Ascorbate) 240 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Total Carbohydrates 1 g 1%
Dietary Fiber 1 g 4%
Vitamin C (as Ascorbic Acid, Mineral Ascorbates) 4000 mg 4444%
Calcium (as Calcium Ascorbate) 212 mg 16%
Magnesium (as Magnesium Ascorbate) 108 mg 26%
Zinc (as Zinc Ascorbate) 10 mg 91%
Manganese (as Manganese Ascorbate) 0.4 mg 17%
Potassium (as Potassium Ascorbate) 240 mg 5%
Lemon Bioflavonoid Complex 400 mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Hydroxypropyl Methylcellulose Safe

It is used as a coating for tablets and capsules.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Microcrystalline Cellulose Safe

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

Dicalcium Phosphate Safe

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

Rutin Generally_safe

It is used for its potential antioxidant and anti-inflammatory properties.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Pharmaceutical Glaze Generally_safe

It is used to coat tablets or capsules for easier swallowing or controlled release.

Price Comparison

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

Brand Trust Report
NaturesPlus

Founded 1972 · Melville, New York, United States · 420 products · naturesplus.com

Transparency

3 claims
Third Party Testing Claim — Claimed
In House Testing — Claimed

Violation History

1 incident
Recall Keto Living Sugar Control Capsules2022-05-06Source
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Frequently Asked Questions
Is NaturesPlus C-Ascorbs Sustained Release a good supplement?

NaturesPlus C-Ascorbs Sustained Release received a product quality score of 76/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 9 active ingredients with 45 servings per container. Of the 8 inactive ingredients, 6 are rated safe and 0 are flagged for review. The manufacturer, NaturesPlus, holds a brand trust score of 59/100.

What are the ingredients in NaturesPlus C-Ascorbs Sustained Release?

NaturesPlus C-Ascorbs Sustained Release contains 9 active ingredients: Total Carbohydrates (1 g), Dietary Fiber (1 g), Vitamin C (as Ascorbic Acid, Mineral Ascorbates) (4000 mg), Calcium (as Calcium Ascorbate) (212 mg), Magnesium (as Magnesium Ascorbate) (108 mg), Zinc (as Zinc Ascorbate) (10 mg), and 3 more. Notable high-dose ingredients include Vitamin C at 4444% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is NaturesPlus C-Ascorbs Sustained Release safe to take?

NaturesPlus C-Ascorbs Sustained Release 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 NaturesPlus a trustworthy supplement brand?

NaturesPlus receives a brand trust score of 59/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1972 and headquartered in Melville, New York, United States, the company offers 420 products in their lineup. Note: NaturesPlus has 1 historical regulatory incident 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.