Source Naturals Ultimate Ascorbate C 1,000 mg supplement bottle
Source Naturals

Ultimate Ascorbate C 1,000 mg

What We Researched
13 active ingredients analyzed · 3 inactive ingredients decoded · 1 brand certification checked · 1 retailer compared · Last updated: Mar 2026
80
Product Score Good
66
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Total Carbohydrates 1 g 1%
Vitamin C (as Calcium Ascorbate, Magnesium Ascorbate, Manganese Ascorbate, Potassium Ascorbate, Zinc Ascorbate) 2000 mg 3333%
Vitamin D3 (as Cholecalciferol) 85 IU 21%
Calcium (as Calcium Ascorbate) 150 mg 15%
Magnesium (as Magnesium Ascorbate, Magnesium Citrate, Magnesium Oxide) 100 mg 25%
Zinc (as Zinc Ascorbate) 25 mg 167%
Copper (as Copper Sebacate) 500 mcg 25%
Manganese (as Manganese Ascorbate) 5 mg 250%
Potassium (as Potassium Ascorbate) 99 mg 3%
Citrus Bioflavonoid Complex 250 mg
Hesperidin 30 mg
Rutin 30 mg
Bioavailability Very Good

Absorption Rating

  • Total Carbohydrates Fair
  • Vitamin C (as Calcium Ascorbate, Magnesium Ascorbate, Manganese Ascorbate, Potassium Ascorbate, Zinc Ascorbate) Good
  • Vitamin D3 (as Cholecalciferol) Good
  • Calcium (as Calcium Ascorbate) Good
  • Magnesium (as Magnesium Ascorbate, Magnesium Citrate, Magnesium Oxide) Good
  • Zinc (as Zinc Ascorbate) Fair
  • Copper (as Copper Sebacate) Fair
  • Manganese (as Manganese Ascorbate) Good
  • Potassium (as Potassium Ascorbate) Good
  • Hesperidin Good
  • Rutin Fair
Other Ingredients Excellent

Fillers & Additives

  • Stearic Acid
  • Hydroxypropylcellulose
  • Modified Cellulose Gum
Efficacy Fair

Dosage Analysis

  • Vitamin C (as Calcium Ascorbate, Magnesium Ascorbate, Manganese Ascorbate, Potassium Ascorbate, Zinc Ascorbate) 2000 mg Effective
  • Vitamin D3 (as Cholecalciferol) 85 IU Under-dosed
  • Calcium (as Calcium Ascorbate) 150 mg Under-dosed
  • Magnesium (as Magnesium Ascorbate, Magnesium Citrate, Magnesium Oxide) 100 mg Under-dosed
  • Zinc (as Zinc Ascorbate) 25 mg Effective
  • Copper (as Copper Sebacate) 500 mcg Effective
  • Manganese (as Manganese Ascorbate) 5 mg Effective
  • Potassium (as Potassium Ascorbate) 99 mg Under-dosed
  • Hesperidin 30 mg Under-dosed
  • Rutin 30 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Calories 10 kcal
Total Carbohydrates 1 g 1%
Vitamin C (as Calcium Ascorbate, Magnesium Ascorbate, Manganese Ascorbate, Potassium Ascorbate, Zinc Ascorbate) 2000 mg 3333%
Vitamin D3 (as Cholecalciferol) 85 IU 21%
Calcium (as Calcium Ascorbate) 150 mg 15%
Magnesium (as Magnesium Ascorbate, Magnesium Citrate, Magnesium Oxide) 100 mg 25%
Zinc (as Zinc Ascorbate) 25 mg 167%
Copper (as Copper Sebacate) 500 mcg 25%
Manganese (as Manganese Ascorbate) 5 mg 250%
Potassium (as Potassium Ascorbate) 99 mg 3%
Citrus Bioflavonoid Complex 250 mg
Hesperidin 30 mg
Rutin 30 mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Hydroxypropylcellulose Generally_safe

It is added to bind ingredients together and provide a smooth coating.

Modified Cellulose Gum Generally_safe

It is used to improve the texture and stability of products.

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
Source Naturals

Founded 1982 · Scotts Valley, CA, USA · 837 products · sourcenaturals.com/

Certifications

1 certification
Fda Gmp Inspections Verified Source

Transparency

2 claims
Third Party Testing Claim — Claimed Source
In House Testing — Verified Source
Related Supplements
Frequently Asked Questions
Is Source Naturals Ultimate Ascorbate C 1,000 mg a good supplement?

Source Naturals Ultimate Ascorbate C 1,000 mg received a product quality score of 80/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 13 active ingredients with 25 servings per container. Of the 3 inactive ingredients, 1 are rated safe and 0 are flagged for review. The manufacturer, Source Naturals, holds a brand trust score of 66/100 with 1 verified certifications including Fda Gmp Inspections.

What are the ingredients in Source Naturals Ultimate Ascorbate C 1,000 mg?

Source Naturals Ultimate Ascorbate C 1,000 mg contains 13 active ingredients: Calories (10 kcal), Total Carbohydrates (1 g), Vitamin C (as Calcium Ascorbate, Magnesium Ascorbate, Manganese Ascorbate, Potassium Ascorbate, Zinc Ascorbate) (2000 mg), Vitamin D3 (as Cholecalciferol) (85 IU), Calcium (as Calcium Ascorbate) (150 mg), Magnesium (as Magnesium Ascorbate, Magnesium Citrate, Magnesium Oxide) (100 mg), and 7 more. Notable high-dose ingredients include Vitamin C at 3333% DV, Manganese at 250% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Source Naturals Ultimate Ascorbate C 1,000 mg safe to take?

Source Naturals Ultimate Ascorbate C 1,000 mg 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 Source Naturals a trustworthy supplement brand?

Source Naturals receives a brand trust score of 66/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1982 and headquartered in Scotts Valley, CA, USA, the company offers 837 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. No regulatory violations or FDA warning letters were found in our research.

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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.