Best Vitamin C Supplement (2026): Form, Dose & Cost Compared
The best vitamin C for most people is Nature Made Vitamin C 500 mg. It is on USP’s testing list and is the cheapest day of the 14 we compared, $0.08. Plain vitamin C is the same vitamin C as pricier forms, and 500 mg is more than the 75 to 90 mg adults need.
By Erin Rose Updated October 19, 2026 How we score
Our pick for: Most people
- Vitamin C a day
- 500 mg1 tablet, plain ascorbic acid
- Testing list
- USP VerifiedChecks contents and purity; listing read September 22, 2026
- Cost
- $0.08 a dayThe cheapest day at brand prices
- Bottle
- 100 tablets$7.99 at Nature Made’s store
Why we pick it It is on USP’s public testing list and is the cheapest day of the 14 we compare. A 500 mg tablet is more than the 75 to 90 mg adults need; in an NIH study of 7 healthy men, a 200 mg dose was fully absorbed (Levine 1996). The smallest vitamin C tablet on USP’s testing list is 500 mg.
What to know It is for adults; children have lower limits (650 mg a day at ages 4 to 8). Had kidney stones or have kidney disease? Ask your doctor before taking it. Nature Made’s 1,000 mg tablet scores the same and is also USP Verified.
Which vitamin C is right for you?
Most people need nothing more than our pick. Here are the other good choices.
Want 1,000 mg a day?
Nature Made’s 1,000 mg tablet is on USP’s testing list too, for $0.16 a day. Men’s blood levels topped out at about 1,000 mg a day in NIH studies (Levine 1996), and trials that made colds about 15% less severe used 1,000 mg or more (Hemilä 2023). Two smaller doses may absorb better than one.
Nature Made Vitamin C 1000 mg
9.0/10 · $0.16 a day · USP Verified
Does plain vitamin C upset your stomach?
NOW C-1000 Buffered is calcium ascorbate, less acidic than plain vitamin C, for $0.20 a day. Some people find it easier on the stomach; it is not better absorbed. NOW says it is quality tested; it is not on a public testing list.
NOW C-1000 Buffered
7.5/10 · $0.20 a day · buffered
Want liposomal vitamin C?
Codeage Liposomal Vitamin C+ is on NSF/ANSI 173, which checks that a product matches its label. Three capsules give 1,500 mg, with elderberry and quercetin. Liposomal forms reached higher blood peaks in industry-linked studies, with no health benefit shown (Carr 2025), and it costs about 4 times plain vitamin C per milligram.
Codeage Liposomal Vitamin C+
8.0/10 · $0.67 a day · NSF/ANSI 173
Want the lowest cost per milligram?
Nature’s Bounty 1,000 mg costs $0.12 per 1,000 mg at Vitacost’s list price, tied with Solgar for the least we found. Its label says “laboratory tested,” but it is not on a public testing list.
Nature’s Bounty Vitamin C 1000 mg
8.5/10 · $0.12 a day
Had kidney stones, or have kidney disease?
Ask your doctor before taking any vitamin C supplement. In men without stones, 1,000 mg or more a day from supplements came with a 19% higher risk (Ferraro 2016); women showed no link.
Getting cancer treatment, or have hemochromatosis?
Ask your doctor first. NIH says people getting chemotherapy or radiation should check with their oncologist, and vitamin C raises iron absorption, which matters for iron overload.
Vitamin C supplements we compared
Scored on dose, testing, cost, label and recalls. Our pick comes first, then by score. Costs are a day (one label serving) and per 1,000 mg at each brand’s own price, checked October 19, 2026. What a day costs, cheapest first.
| Vitamin C | A day | Per 1,000 mg | Why it is or is not a pick |
|---|---|---|---|
| Nature Made Vitamin C 500 mg9.0/10 · 500 mg | $0.08 | $0.16 | Our pick: USP Verified; the cheapest day |
| Nature Made Vitamin C 1000 mg9.0/10 · 1,000 mg | $0.16 | $0.16 | USP Verified; 1,000 mg, more than you absorb well at once |
| Nature’s Bounty Vitamin C 1000 mg8.5/10 · 1,000 mg | $0.12 | $0.12 | Lowest cost per mg (tied); brand claim only |
| Codeage Liposomal Vitamin C+8.0/10 · 1,500 mg | $0.67 | $0.44 | Liposomal on NSF/ANSI 173; about 4 times plain per mg |
| NOW C-1000 with Bioflavonoids7.5/10 · 1,000 mg | $0.13 | $0.13 | Low cost; bioflavonoids not shown to help |
| NOW C-1000 Buffered7.5/10 · 1,000 mg | $0.20 | $0.20 | Buffered, less acidic; brand claim only |
| Solgar Vitamin C 1000 mg7.0/10 · 1,000 mg | $0.12 | $0.12 | Low cost; no testing claim |
| Thorne Vitamin C with Flavonoids6.5/10 · 500 mg | $0.26 | $0.51 | 500 mg with flavonoids; brand claim; costs more |
| Doctor’s Best Vitamin C 1000 mg6.0/10 · 1,000 mg | $0.17 | $0.17 | Vegan capsule; no testing claim |
| Bluebonnet Vitamin C 1000 mg6.0/10 · 1,000 mg | $0.22 | $0.22 | Vegan capsule; no testing claim |
| American Health Ester-C 1000 mg5.0/10 · 1,000 mg | $0.23 | $0.23 | Ester-C, less acidic; no testing claim |
| Pure Encapsulations Ascorbic Acid5.0/10 · 1,000 mg | $0.25 | $0.25 | Hypoallergenic capsule; no testing claim; costs more |
| Core Med Science Liposomal Vitamin C5.0/10 · 1,000 mg | $0.83 | $0.83 | Liposomal softgels; no testing claim |
| LivOn Lypo-Spheric Vitamin C5.0/10 · 1,000 mg | $1.43 | $1.43 | Liposomal packets; the most per mg |
How to read a vitamin C label
Look for the vitamin C milligrams per serving, and whether a serving is 1 or more tablets. The form is on the label too: “ascorbic acid” is plain vitamin C, “calcium ascorbate” is buffered. Plain vitamin C is the cheapest, and the body uses it the same way as the pricier forms; compare them in vitamin C forms compared.
Does vitamin C work?
It prevents the shortage that causes scurvy. For most other claims, the trials found little.
- Colds: in trials of 200 mg a day or more, regular vitamin C did not cut how often most people caught colds; it shortened them by about 8% in adults. Marathon runners, skiers and soldiers in the cold got half as many colds (Hemilä 2013).
- Heart and cancer: in 14,641 male doctors given 500 mg a day for about 8 years, vitamin C did not lower heart attacks, strokes, cancer or deaths (Sesso 2008; Gaziano 2009).
More in our vitamin C guide.
Questions people ask
What is the best vitamin C supplement?
For most people, Nature Made Vitamin C 500 mg. It is on USP Verified, which checks contents and purity, and costs $0.08 a day at the brand’s price. Want 1,000 mg? Nature Made’s 1,000 mg tablet is USP Verified too.
How much per day?
Adults need 75 mg (women) to 90 mg (men), and smokers 35 mg more (NIH). The body fully absorbed a 200 mg dose and less of 500 mg and up (Levine 1996). The adult upper limit is 2,000 mg a day. See how much to take.
Is liposomal better?
It reached higher blood peaks in studies, but all 10 in a 2025 review had industry funding or company authors, and none showed a health benefit (Carr 2025). It costs 4 to 12 times plain vitamin C per milligram.
Do bioflavonoids help?
We found no human trial showing bioflavonoids help you absorb vitamin C. They are harmless, but not worth paying extra for.
How we score
Five marks: does a serving hold at least the 75 mg daily amount; is the product on a public testing list; what 200 mg costs at the brand’s own price against the cheapest; does the label state the amount; and the brand’s FDA recall record. Dose and testing are worth up to 3 points each, cost up to 2, label and recalls up to 1 each. More on our method.
Sources
- NIH Office of Dietary Supplements. Vitamin C fact sheet for health professionals (updated July 31, 2025).
- Levine M, et al. “Vitamin C pharmacokinetics in healthy volunteers: evidence for a recommended dietary allowance.” Proc Natl Acad Sci USA. 1996. PubMed 8623000
- Hemilä H, Chalker E. “Vitamin C for preventing and treating the common cold.” Cochrane Database Syst Rev. 2013. PubMed 23440782. Hemilä H, Chalker E. “Vitamin C reduces the severity of common colds: a meta-analysis.” BMC Public Health. 2023. PubMed 38082300
- Sesso HD, et al. “Vitamins E and C in the prevention of cardiovascular disease in men: the Physicians’ Health Study II randomized controlled trial.” JAMA. 2008. PubMed 18997197. Gaziano JM, et al. JAMA. 2009. PubMed 19066368
- Carr AC. “Do Liposomal Vitamin C Formulations Have Improved Bioavailability? A Scoping Review Identifying Future Research Directions.” Basic Clin Pharmacol Toxicol. 2025. PubMed 40506693
- Ferraro PM, et al. “Total, Dietary, and Supplemental Vitamin C Intake and Risk of Incident Kidney Stones.” Am J Kidney Dis. 2016. PubMed 26463139
- Testing lists: USP Verified and NSF/ANSI 173. Vitamin C amounts and prices from each brand’s own page (Nature’s Bounty and Solgar at Vitacost).