Ester-C American Health with Citrus Bioflavonoids Capsules
- Vitamin C
- Tablet
- Vitamin C
- 90
- More reviewed than 65%
A 1000 mg non-acidic Ester-C tablet with added citrus bioflavonoids, gluten free and sold in a 90-count bottle.
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How it ranks among the 88 vitamin c we track
4.8★ across 5,657 Amazon ratings, Bayesian-smoothed toward the category average.
5,657 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
3,000+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 88 vitamin c we track - how the scorecard works · full vitamin c data report. Confidence: high - strong rating volume and complete data.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
Ester-C from American Health combines 1000 mg of a non-acidic vitamin C with citrus bioflavonoids in a 90-count tablet bottle, marketed for 24-hour immune support and described as gentle on the stomach.
Ester-C's distinction from ordinary ascorbic acid is that it's a non-acidic vitamin C form, which the brand pairs with citrus bioflavonoids rather than selling vitamin C alone.
- 1000 mg Ester-C vitamin C
- Citrus bioflavonoids added
- Non-acidic, gentle on stomach
- 90 tablets, gluten free
Who it's for
Suits someone who wants a higher 1000 mg vitamin C dose but finds regular ascorbic acid hard on the stomach. Not needed for anyone who tolerates standard vitamin C tablets without issue.
Strengths and trade-offs
Drawn from this product's published specifications.
- 1000 mg non-acidic vitamin C per serving
- Includes citrus bioflavonoids
- Gluten free, non-GMO
- Tablet form only
- 90-count bottle is a modest supply at daily use
Performance notes
Ester-C uses a non-acidic vitamin C form paired with citrus bioflavonoids, which the brand markets as gentler on the stomach than standard ascorbic acid. The listing frames the benefit as 24-hour immune support, tied to the non-acidic formulation rather than a separate delivery technology.
Specifications
| Brand | Ester-C |
|---|---|
| Model | 16975 |
| Form | Tablet |
| Supplement Type | Vitamin C |
| Count | 90 |
| Flavor | Citrus |
| Diet | Gluten Free |
| Benefits | Immune Support |
| Allergens | Gluten Free |
How it compares
This product against the closest alternatives we track in vitamin c.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Ester-C American Health with Citrus Bioflavonoids CapsulesThis product | 4.8 / 5 | 5,657 | 4.7 / 5 |
| Emergen-C 1000mg Vitamin C Powder for Daily Immune Support Caffeine Free Vitamin C…Emergen-C | 4.8 / 5 | 53,857 | 4.7 / 5 |
| Nature's Bounty Vitamin C + Rose HipsNature’s | 4.8 / 5 | 49,343 | 4.7 / 5 |
| Nature Made Extra Strength Vitamin C 1000 mg TabletsNATURE | 4.8 / 5 | 40,190 | 4.7 / 5 |
| Nutricost Vitamin C with Rose Hips 1025mgNutricost | 4.8 / 5 | 23,867 | 4.7 / 5 |
Similar vitamin c from other brands
Questions about the Ester-C 16975
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What makes Ester-C different from regular vitamin C?
It uses a non-acidic vitamin C form, which the brand markets as gentler on the stomach.
Does Ester-C include bioflavonoids?
Yes, citrus bioflavonoids are included alongside the 1000 mg vitamin C dose.
How many tablets are in the bottle?
90 tablets.