Nature's Bounty Ester-C®, Maximum Strength, 1,000 mg, 120 Vegetarian Coated Tablets supplement bottle
Nature's Bounty

Ester-C®, Maximum Strength, 1,000 mg, 120 Vegetarian Coated Tablets

What We Researched
3 active ingredients analyzed · 7 inactive ingredients decoded · 6 brand certifications checked · 3 retailers compared · Last updated: Mar 2026
83
Product Score Good
86
Brand Score Good

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin C (as Ester-C® Calcium Ascorbate) 1,000 mg 1,111%
Calcium (as Ester-C® Calcium Ascorbate) 110 mg 8%
C-Sorb™ Citrus Bioflavonoid ComplexCitrus Bioflavonoid Complex (Citrus spp.) (peel and fruit), Sweet Orange, Tangerine, Lime, Lemon, Acerola Extract, Rutin, Hesperidin Complex (Citrus spp.) (peel), Naturally Occurring Vitamin C Metabolites 102 mg **
Bioavailability Excellent

Absorption Rating

  • Vitamin C (as Ester-C® Calcium Ascorbate) Good
  • Calcium (as Ester-C® Calcium Ascorbate) Good
  • C-Sorb™ Citrus Bioflavonoid ComplexCitrus Bioflavonoid Complex (Citrus spp.) (peel and fruit), Sweet Orange, Tangerine, Lime, Lemon, Acerola Extract, Rutin, Hesperidin Complex (Citrus spp.) (peel), Naturally Occurring Vitamin C Metabolites Good
Other Ingredients Excellent

Fillers & Additives

  • Vegetable Cellulose
  • Calcium Silicate
  • Maltodextrin
  • Natural Palm Leaf Glaze
  • Triacetin
  • Vegetable Magnesium Stearate
  • Vegetable Stearic Acid
Efficacy Poor

Dosage Analysis

  • Vitamin C (as Ester-C® Calcium Ascorbate) 1,000 mg Effective
  • Calcium (as Ester-C® Calcium Ascorbate) 110 mg Under-dosed
  • C-Sorb™ Citrus Bioflavonoid ComplexCitrus Bioflavonoid Complex (Citrus spp.) (peel and fruit), Sweet Orange, Tangerine, Lime, Lemon, Acerola Extract, Rutin, Hesperidin Complex (Citrus spp.) (peel), Naturally Occurring Vitamin C Metabolites 102 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin C (as Ester-C® Calcium Ascorbate) 1,000 mg 1,111%
Calcium (as Ester-C® Calcium Ascorbate) 110 mg 8%
C-Sorb™ Citrus Bioflavonoid ComplexCitrus Bioflavonoid Complex (Citrus spp.) (peel and fruit), Sweet Orange, Tangerine, Lime, Lemon, Acerola Extract, Rutin, Hesperidin Complex (Citrus spp.) (peel), Naturally Occurring Vitamin C Metabolites 102 mg **

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Vegetable Cellulose Safe

Forms a vegetarian capsule shell alternative to gelatin.

Calcium Silicate Safe

Prevents ingredient clumping during manufacturing.

Maltodextrin Generally_safe

Helps carry and stabilize active ingredients. Provides bulk.

Natural Palm Leaf Glaze Safe

It is used to give tablets a shiny coating.

Triacetin Generally_safe

It is used as a solvent or humectant.

Vegetable Magnesium Stearate Safe

Prevents ingredients from sticking to equipment. Derived from vegetable sources.

Vegetable Stearic Acid Generally_safe

It is used to prevent ingredients from sticking to manufacturing equipment.

Price Comparison

iHerb $21.78
Best Price
Target $23.98

Price History

Tracked across major retailers. Updated periodically.

$23$22$21$20$19 Mar 12 $21.00
iHerb

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

Brand Trust Report
Nature's Bounty

Founded 1971 · Ronkonkoma, New York, USA · 156 products · naturesbounty.com

Certifications

6 certifications
Clean Label Project Verified Source
Consumerlab Verified
Health Canada Licensed Verified Source
Labdoor Verified Source
Usda Organic Verified Source
Fda Gmp Inspections Verified Source

Transparency

3 claims
Third Party Testing Claim — Verified Source
In House Testing — Verified Source

Violation History

1 incident
Recall Nature's Bounty Kids Multivitamin Gummies2023-06-02Source
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Frequently Asked Questions
Is Nature's Bounty Ester-C®, Maximum Strength a good supplement?

Nature's Bounty Ester-C®, Maximum Strength, 1,000 mg, 120 Vegetarian Coated Tablets received a product quality score of 83/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 3 active ingredients Of the 7 inactive ingredients, 4 are rated safe and 0 are flagged for review. The manufacturer, Nature's Bounty, holds a brand trust score of 86/100 with 6 verified certifications including Clean Label Project, Consumerlab, Health Canada Licensed, Labdoor.

What are the ingredients in Nature's Bounty Ester-C®, Maximum Strength?

Nature's Bounty Ester-C®, Maximum Strength contains 3 active ingredients: Vitamin C (as Ester-C® Calcium Ascorbate) (1,000 mg), Calcium (as Ester-C® Calcium Ascorbate) (110 mg), C-Sorb™ Citrus Bioflavonoid ComplexCitrus Bioflavonoid Complex (Citrus spp.) (peel and fruit), Sweet Orange, Tangerine, Lime, Lemon, Acerola Extract, Rutin, Hesperidin Complex (Citrus spp.) (peel), Naturally Occurring Vitamin C Metabolites (102 mg). Notable high-dose ingredients include Vitamin C at 1,111% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Nature's Bounty Ester-C®, Maximum Strength safe to take?

Nature's Bounty Ester-C®, Maximum Strength, 1,000 mg, 120 Vegetarian Coated Tablets 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 Nature's Bounty a trustworthy supplement brand?

Nature's Bounty receives a brand trust score of 86/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1971 and headquartered in Ronkonkoma, New York, USA, the company offers 156 products in their lineup. They hold 6 verified certifications including Clean Label Project, Consumerlab, Health Canada Licensed, Labdoor. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Nature's Bounty 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.