NOW Foods Supplements
- Vitamin C
- Capsule
- Calcium, Vitamin C
- 250
A buffered calcium ascorbate vitamin C capsule in a 250-count bottle built for daily long-term use. The gentler form is the main reason to pick this over plain ascorbic acid.
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How it ranks among the 88 vitamin c we track
4.8★ across 1,300 Amazon ratings, Bayesian-smoothed toward the category average.
1,300 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
1,000+ 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
NOW Foods' Vitamin C-500 uses calcium ascorbate, a buffered form of vitamin C, in a 250-count vegan capsule bottle. Aimed at anyone who wants a large-supply vitamin C option that's gentler on the stomach than plain ascorbic acid.
Calcium ascorbate is a buffered, non-acidic form of vitamin C, which matters for anyone who finds standard ascorbic acid hard on the stomach; it also adds a small amount of calcium alongside the vitamin C. At 250 capsules, this is a large bottle built for daily long-term use rather than a short course. There's no seller description or review history on this listing, so the buffered-form detail and count are what can be confirmed from the label.
- Vitamin C as calcium ascorbate
- 250 veg capsules per bottle
- Vegan, dairy/egg/nut/soy free
- Marketed for antioxidant and immune support
Who it's for
Fits someone who wants a large-supply vitamin C capsule in a gentler buffered form, ideally already comfortable swallowing capsules daily. Less suited to someone who wants a chewable, gummy, or unbuffered ascorbic acid product.
Strengths and trade-offs
Drawn from this product's published specifications.
- Buffered calcium ascorbate form, gentler than plain ascorbic acid
- Large 250-count bottle for long-term daily use
- Vegan capsules, dairy, egg, nut and soy free
- Adds a small amount of calcium, which may matter for anyone tracking calcium intake separately
- No description or review data available on this listing
Performance notes
Vitamin C here comes as calcium ascorbate rather than plain ascorbic acid, a buffered form that's generally easier on the stomach and contributes a small amount of calcium alongside the vitamin C. With 250 vegan capsules in the bottle, one capsule a day lasts well over eight months.
Specifications
| Brand | Now |
|---|---|
| Model | 0677 |
| Form | Capsule |
| Supplement Type | Calcium, Vitamin C |
| Count | 250 |
| Flavor | Unflavored |
| Diet | Vegan |
| Benefits | Antioxidant, Immune Support |
| Allergens | Dairy Free, Egg Free, Nut Free, Soy Free |
Other Now vitamin c
How it compares
This product against the closest alternatives we track in vitamin c.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| NOW Foods SupplementsThis product | 4.8 / 5 | 1,300 | 4.5 / 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 Now 0677
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What form of vitamin C does NOW Foods Vitamin C-500 use?
It uses calcium ascorbate, a buffered form that's gentler on the stomach than plain ascorbic acid.
How long does a 250-count bottle last?
Over eight months at one capsule per day.
Is this vitamin C supplement vegan?
Yes, the capsules are vegan and free of dairy, egg, nut and soy.