NOW Vitamin C-1,000 with Bioflavonoids Review: Would Buyers Buy It Again?
Disclosure: As an Amazon Associate I earn from qualifying purchases. If you buy through links on this page we may earn a commission at no extra cost to you. How this review was made: We did not test this supplement. This verdict is based on database listings and the NIH fact sheet on vitamin C, listed at the end. We found no independent lab test of this exact product, and say so below. Our method.
A no-frills vitamin C that repeat buyers tend to stick with
This is a straightforward 1,000 mg vitamin C with a small amount of citrus bioflavonoids. We found no problems in the sources. The caveats: one scoring site notes no independent third-party purity certification, and another says NOW's testing is accredited but not verified for this specific product. Also, the NIH says regular vitamin C did not reduce colds in the general population, so do not expect miracles. If you simply want a vitamin C supplement, it is a sensible repeat buy; most people may not need that much.
Check current price on Amazon → Prices and availability change often, so we don't list them here.Buy it again if you…
- want a simple, single-ingredient vitamin C
- like bioflavonoids included
- accept a high-dose tablet or capsule
Skip it if you…
- want certified third-party tested products (USP, NSF)
- expect it to prevent colds
- have kidney stones, iron overload or take medication without medical advice
NOW Vitamin C-1,000 with Bioflavonoids is a 1,000 mg vitamin C supplement that adds citrus bioflavonoids. Listings vary by size and form, so check the label on the version you order.
This review is not medical advice. Supplements are not evaluated by the FDA to treat or prevent any disease. Check with a doctor or pharmacist before use, especially if you are pregnant, take medication or have a health condition.
What owners say, at a glance
Bars show our editorial summary of how consistently owners praise or complain about each area across all sources — not a lab measurement.
What the label gives you
| Vitamin C | 1,000 mg (a listing for a related capsule version) |
|---|---|
| Bioflavonoids | Citrus bioflavonoid complex, about 100 mg, plus rutin in one listing |
| Form | Varies by listing: tablet or vegetarian capsule |
What research and experts say
Quality and testing
One scoring site, SupplementScored, found no independent third-party purity certification for a NOW C-1000 listing, though it notes GMP-audited manufacturing and no proprietary blend. SuppCo says the product line has ISO 17025-accredited third-party testing, but states that product-specific testing is not verified. If a USP or NSF seal matters to you, look for it on the label.
Tips
- Take with food if it upsets your stomach.
- Many people get enough from a normal diet; consider a lower dose.
- Check the exact version (tablet or capsule) you are ordering.
Pros and cons
What owners love
- Simple formula
- Bioflavonoids included
- No proprietary blend noted
- Widely available brand
What owners complain about
- High dose may upset the stomach
- No independent certification confirmed for this exact product
- Little evidence for preventing colds
- Many people already get enough from food
Other options buyers compare
Common comparisons for vitamin C.
| Option | Style | Consider it if… | |
|---|---|---|---|
| NOW Vitamin C-1,000 (this review) | Tablet/capsule with bioflavonoids | You want plain, simple vitamin C | See on Amazon |
| Emergen-C 1000 mg Read our review | Drink mix | You prefer a powder mix | See on Amazon |
| Citrus fruit, peppers and other foods | Diet | You may already meet your needs from food | — |
Looking for a simple vitamin C?
Check the current size and form options on Amazon.
Frequently asked questions
Does vitamin C prevent colds?
The NIH reports regular use did not reduce colds in the general population, though it may modestly shorten them.
Is 1,000 mg too much?
It is below the adult upper limit of 2,000 mg a day, but can upset the stomach. Ask a doctor or pharmacist.
Is it third-party tested?
Sources conflict: one finds no independent certification, another says the brand's testing is accredited but not verified for this product.
Who should be careful?
People who are pregnant, take medication, have kidney stones or iron overload should ask a doctor first.
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Sources we analyzed
- NIH Office of Dietary Supplements: Vitamin C — intake, upper limit, cold evidence
- SupplementScored: Nature Made vs NOW Vitamin C — testing and quality scoring
- SuppCo: NOW C-1000 with bioflavonoids — ingredients and testing note
Figures reflect each source as of October 21, 2026 and may change. We summarize owner feedback in our own words and do not reproduce retailer reviews.