Nature Made Extra Strength Vitamin C 1000 mg Tablets, 300 Count Review
#2 of 9 · Best Value✓ Label verified · Supplement Facts read Sep 7, 2026Real retailer photo, cut out. Label unedited.
Buy it. The most credible independent verification in the category, at the lowest cost per milligram. USP Verification is the reason this sits at #2 despite the harshest form on the list.
~$14~$0.05 / tablet
Why It Scores 7.1 — And The Label Line Behind Each Number
Form & Bioavailability
30% of scorePlain L-ascorbic acid — the reference form, fully bioavailable within the body's saturable limits, but with no comfort or delivery upgrade. Bioavailability is identical to pricier ascorbic-acid picks.
- Form
- Plain L-ascorbic acid (unbuffered)
Third-Party Testing & QA
25% of scoreUSP Verified for potency, purity and disintegration — the gold-standard independent check, and rare at this price. It confirms the label claim and that the tablet dissolves.
- Testing
- USP Verified for potency, purity & disintegration
Dose Strategy vs. Clinical Range
15% of scoreA single 1,000 mg tablet overshoots the ~200 mg absorption ceiling and is hard to split, so much of each dose is excreted. Convenient, but not the smartest dose design.
- Dose
- 1,000 mg per tablet (1,111% DV)
GI Tolerance & Suitability
15% of scoreUnbuffered 1,000 mg is the harshest form in this set on an empty stomach. Taking it with food helps, but acid-sensitive users will feel it.
Value per Serving
15% of scoreAt roughly $0.05 per tablet across a 300-day supply, this is the lowest cost per milligram in the group by a wide margin.
- Count
- 300 tablets / 300 servings
- Value
- 300-day supply, lowest cost/mg here
- Price
- ~$14
- Cost per serving
- ~$0.05 / tablet
Label verified. Every figure read from the Supplement Facts photo, Sep 7, 2026.
Marketing Claims Vs. Reality
USP Verified for potency, purity and disintegration.
USP's independent verification program confirms label-claim potency, absence of specified contaminants, and that the tablet disintegrates — an auditable, third-party mark.
'Extra Strength' 1,000 mg delivers extra benefit.
Levine 1996 shows plasma saturates by ~200-400 mg/day; the extra 600-800 mg is largely excreted, so the higher dose is convenience, not proven added benefit.
#1 Pharmacist Recommended brand.
This reflects real pharmacist-survey rankings, but it measures brand recognition and trust, not a head-to-head test of this specific product's quality.
Unbuffered 1,000 mg is harsh on an empty stomach.
Plain L-ascorbic acid is acidic (pH ~2-3), and gram doses commonly cause GI upset when taken without food — a well-documented tolerance issue.
What Our Test Actually Found
USP Verification is the headline
Most bargain vitamin C skips independent testing. This one carries USP's mark, which checks potency, contaminants and disintegration. At ~$0.05 a tablet, that combination is unusual and is the whole reason it ranks this high.
The dose overshoots on purpose
1,000 mg is a marketing round number, not a physiological one. Your gut caps absorption near 200 mg per dose, so a large share of each tablet is excreted. It's not harmful — just not the extra benefit the 'Extra Strength' label implies.
Your stomach is the real cost
Unbuffered ascorbic acid at a full gram is the least gentle option here. If you take it with a meal most people are fine; if you're acid-sensitive, step up to a buffered pick like NOW or Pure Encapsulations.
Hard to split
A coated 1,000 mg tablet doesn't halve cleanly, so the smart split-dose strategy is awkward here. If you value that, a capsule (Thorne, Nutricost) is easier to divide.
Full analysis: all pros & cons (7), buy if / skip if
- USP Verified for potency, purity and disintegration — rare at this price and the gold-standard independent check
- 300-day supply at the lowest cost per milligram of the group
- Nature Made is the #1 Pharmacist Recommended brand
- 300-count bottle means you rarely reorder — close to a 10-month supply per purchase
- Plain unbuffered ascorbic acid at 1,000 mg is the harshest form on the stomach
- A single 1,000 mg tablet is hard to split and overshoots the ~200 mg ceiling — most is excreted
- The 'Extra Strength' dose is convenience, not proven extra benefit
- You want a genuinely verified vitamin C for pennies per dose
- You take supplements with food and tolerate acidity fine
- You want a long supply with rare reordering
- You have a sensitive or acid-prone stomach
- You want a form built for split dosing or gentler on the gut
USP Verification is the reason this sits at #2 despite the harshest form on the list. It confirms potency, purity and that the tablet actually breaks down. The trade-off is your stomach — unbuffered 1,000 mg can bite on an empty gut — and the fact that most of a gram dose is excreted. Take it with food and it's the best value here.
If your only question is 'give me a verified vitamin C for as little money as possible,' this is the answer. A 300-day supply for around $14, carrying the USP Verified mark that most cheap bottles can't. The catch is the form: plain, unbuffered 1,000 mg tablets are the harshest on your stomach here, and the 'Extra Strength' dose overshoots what your body can absorb.
Unbeatable verified value — mind your stomach
If you want a verified, no-nonsense vitamin C for pennies, nothing here beats it, and USP Verification is why it sits at #2 despite the harshest form on the list. The only real trade-off is your gut: unbuffered 1,000 mg can bite on an empty stomach. Take it with food, or step up to a buffered pick if you're acid-sensitive.
If This Doesn’t Fit — Try These
01Thorne Vitamin C + Flavonoids
Our take: this wins on the two things that actually move the needle — independent testing and a dose you can use intelligently — rather than on a marketing form.
03NOW C-1000 Complex
Our take: the best everyday all-rounder — gentler than plain C, cheaper than the boutique buffered options, from a brand that actually passes independent GMP audits.
07Nutricost Vitamin C + Rose Hips
Our take: honest bulk value, provided you see through the 'with rose hips' badge — 25 mg does nothing meaningful.
Quick Answers
Is a cheap vitamin C actually reliable?
When it's USP Verified, yes. That independent mark confirms the tablet contains what the label says, is free of specified contaminants, and dissolves properly — which is exactly why this bargain bottle ranks so high.
Will 1,000 mg upset my stomach?
It can on an empty stomach — this is plain unbuffered ascorbic acid, the most acidic form here. Take it with food, or choose a buffered option if you're acid-sensitive.
Do I really need 1,000 mg a day?
Probably not. Plasma saturates by a few hundred milligrams, so most of a gram is excreted. The dose is fine and safe, but don't expect extra benefit from the bigger number.
Sources & Further Reading
2 peer-reviewed sources, each linked to PubMed
- [1] Levine M, et al. Vitamin C pharmacokinetics in healthy volunteers: evidence for a recommended dietary allowance. Proc Natl Acad Sci USA. 1996;93(8):3704-3709. PMID 8623000 — Vitamin C pharmacokinetics in healthy volunteers: evidence for a recommended dietary allowance. Plasma saturates around 200-400 mg/day with no added benefit above ~400 mg, so a 1,000 mg single dose is largely excreted.
- [2] Hemilä H, Chalker E. Vitamin C for preventing and treating the common cold. Cochrane Database Syst Rev. 2013;(1):CD000980. PMID 23440782 — Vitamin C for preventing and treating the common cold. Regular supplementation did not reduce cold incidence (RR 0.97) but modestly shortened duration; routine megadosing is not justified for most people.
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