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C 500 mg

Swanson
4.8
★ ★ ★ ★ ★
(9310 ratings)
Vitamin C 500 mg
Product Image
Score82
A high-count, practical vitamin C capsule with clear dosing. Its formula is basic, unbuffered, and narrowly focused.
How scoring works
Quantity:400 Capsule(s) • (400 servings)
Goals:
Immunity
General Health
Skin Health
Vision Support

Score 82

A high-count, practical vitamin C capsule with clear dosing. Its formula is basic, unbuffered, and narrowly focused.
How scoring works

Also available as

5 options
500mg • 250 Tablet(s) servings C 500 mg • 250 Tablet(s) • 250 servings $17.39 ($0.06 per serving) 1000mg • 250 Tablet(s) servings C 1000 mg • 250 Tablet(s) • 250 servings $18.39 ($0.07 per serving) 1000mg • 250 Capsule(s) servings C 1000 mg • 250 Capsule(s) • 250 servings $19.79 ($0.07 per serving) 100 servings C 500 mg • 100 Capsule(s) • 100 servings $10.19 ($0.10 per serving) 500mg • 100 Capsule(s) servings Flavonoid (mixture) 200 mg, C 500 mg • 100 Capsule(s) • 100 servings $13.19 ($0.13 per serving)
$19.79($0.04 per serving)
iHerb
$ 19.79
iHerb
$ 19.79
iHerb
$ 19.79
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Analysis

The 500 mg amount supports antioxidant defenses, collagen production, and normal immune function. It is a sensible range for users targeting a specific vitamin C gap.

Ascorbic acid is clearly identified but is not buffered or paired with an uptake aid. The small rose-hip extract does not materially expand the formula.

The large bottle is well suited to consistent long-term use. Users looking for broad vision, skin barrier, or immune coverage will need other nutrients elsewhere.

Who is it for
  • Long-term vitamin C users
  • Adults who prefer capsules
  • People seeking a moderate daily amount
Best for
  • Value-focused supplementation
  • Antioxidant support
  • Collagen and immune nutrition

Pros

  • Practical 500 mg serving
  • Very large serving count
  • Clearly stated active amounts
  • Streamlined capsule format

Cons

  • No buffering
  • No enhanced-delivery system
  • Rose hips add little depth
  • Does not address other goal pathways

Warnings

  • Unbuffered ascorbic acid may upset sensitive stomachs
  • Capsules may be difficult for people with swallowing concerns
  • People prone to calcium oxalate kidney stones should consider total vitamin C intake

Nutrient quality

85 Highest impact

Ordinary ascorbic acid is established but offers no buffering, and the small rose hip addition does not materially improve delivery. The serving is substantial without appearing unnecessarily aggressive for most adults.

Ingredient transparency

81 Highest impact

Each listed active ingredient has a specific amount. Complete excipient details and clear daily intake guidance are not supplied.

Customer satisfaction

74 High impact

The supplied aggregate satisfaction metrics are strong and based on meaningful volume. No feedback excerpts or complaint themes are supplied, so experience patterns cannot be verified.

Value for money

90 Highest impact

Serving value appears favorable for the disclosed dose. The focused ingredient profile avoids costly low-value extras.

Report analysis

Goals

Immunity
Immunity
Impact
High effect
B+ Goal FitB+ Strength of SupportC- CoverageA Formula Quality
Vitamin C · 500 mg

Vitamin C directly supports immune-cell function, epithelial barriers, and antioxidant protection, although it covers only one main immune pathway. Vitamin C has strong established nutritional evidence, with the clearest benefit when intake is inadequate or demand is elevated.

The 500 mg vitamin C serving reaches the configured immune-support range rather than providing a token amount. Standard ascorbic acid and rose hip amounts are individually listed, but no buffering or specialized uptake support is included.

Study evidence
Vitamin C Supportive 53 studies
General Health
General Health
Impact
High effect
B- Goal FitB+ Strength of SupportC- CoverageB+ Formula Quality
Vitamin C · 500 mg

A clearly labeled vitamin C amount offers dependable antioxidant and collagen support. Standard ascorbic acid is well understood and falls within a practical daily range.

The small rose hip extract adds little functional depth, leaving a focused rather than comprehensive formula. The simple design suits users seeking basic vitamin C support.

Study evidence
Vitamin C Supportive 56 studies
Skin Health
Skin Health
Impact
High effect
B- Goal FitB Strength of SupportC- CoverageB+ Formula Quality
Vitamin C · 500 mg

Vitamin C directly supports collagen synthesis and antioxidant defense. The serving provides a useful amount for this focused pathway.

Plain ascorbic acid is fully disclosed but lacks buffering or enhanced absorption. The small rose hip addition is related, while hydration, barrier, and structural-protein pathways remain uncovered.

Study evidence
Vitamin C Supportive 53 studies
Vision Support
Macular and Blue Light Defense
Vision Support
Impact
High effect
C Goal FitB Strength of SupportD CoverageB+ Formula Quality
Vitamin C · 500 mg

Vitamin C provides antioxidant support used within established vision-nutrition frameworks. Taken alone, it does not supply macular pigments, structural lipids, zinc, or vitamin E.

The amount is useful and clearly disclosed, though standard ascorbic acid offers no special delivery advantage. The lean formula has good depth for one antioxidant but very narrow ocular coverage.

Study evidence
Vitamin C Disputed 24 studies
Anti-Inflammatory Support
Cellular Defense
Anti-Inflammatory Support
Impact
Moderate effect
D+ Goal FitC+ Strength of SupportF CoverageA Formula Quality
Vitamin C · 500 mg

Vitamin C provides a useful antioxidant amount with modest inflammation relevance. It does not directly inhibit the major pathways highlighted for this goal.

The label clearly states the amount and form. No companion active adds broader or deeper anti-inflammatory action.

Study evidence
Vitamin C Supportive 50 studies

Ingredients

IngredientAmount per serving
Vitamin C (Ascorbic Acid)
 500 mg
Rose Hips 4:1 extract
12.5 mg
Adults 18–50
Report overview
Vitamin C (Ascorbic Acid) · 500 mg OverallScore68
F Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyA+ Value

Standard ascorbic acid provides a useful daily amount, while the small rose hip addition does not change its basic delivery. The 500 mg serving falls within the preferred intake range. Vitamin C is clearly quantified apart from the rose hip extract, while the large bottle offers exceptionally low cost per gram.

View ingredientView products
Loading alternative details
89 Performance

C-500 Calcium Ascorbate-C

NOW
The buffered vitamin C form may be easier to tolerate than the original plain ascorbic acid formula. Its 500 mg of calcium ascorbate is buffered and includes 55 mg of calcium; the 10 mg bioflavonoid addition is modest.
88 Performance

Buffered Gold C

California Gold Nutrition
The buffered vitamin C form may be easier to tolerate than the original plain ascorbic acid formula. Its 1,000 mg of sodium ascorbate is buffered and simply formulated, with 130 mg of sodium clearly disclosed.
88 Performance

Sodium Ascorbate Capsules

NutriBiotic Immunity
The buffered vitamin C form may be easier to tolerate than the original plain ascorbic acid formula. Its capsules provide 850 mg of buffered sodium ascorbate with a clearly disclosed 100 mg sodium contribution.
85 Budget

C-500 With Rose Hips

NOW
The supplied serving-cost data indicates a less expensive way to obtain a comparable vitamin C serving. Compared with the original plain ascorbic acid formula, it supplies 500 mg of ascorbic acid with 40 mg of rose hips, although the vitamin C remains unbuffered.
83 Budget

C 500 mg

21st Century
The supplied serving-cost data indicates a less expensive way to obtain a comparable vitamin C serving. Compared with the original plain ascorbic acid formula, it supplies 500 mg of ascorbic acid with 30 mg of calcium in a basic, clearly dosed formula.
85 Budget

Gold C Vitamin C 1000 mg

California Gold Nutrition
The supplied serving-cost data indicates a less expensive way to obtain a comparable vitamin C serving. Compared with the original plain ascorbic acid formula, it supplies 1,000 mg of plain ascorbic acid without extra actives, favoring simplicity rather than buffering.
87 Value

100% Pure Vitamin C Powder

Swanson Premium Brand
The combination of a focused ingredient list and efficient supply makes it a stronger value candidate than the original plain ascorbic acid formula. Its powder provides 1,000 mg of ascorbic acid with flexible measuring, though the acidic form may not suit every user.
87 Value

C 500 mg

Mason Natural
The combination of a focused ingredient list and efficient supply makes it a stronger value candidate than the original plain ascorbic acid formula. Its single active is 500 mg of ascorbic acid, making the label easy to assess despite the lack of buffering.
88 Value

Sodium Ascorbate

NutriBiotic Immunity
The combination of a focused ingredient list and efficient supply makes it a stronger value candidate than the original plain ascorbic acid formula. Its 1,100 mg of sodium ascorbate is fully buffered, but the disclosed 120 mg of sodium matters for sodium-restricted users.
Report alternatives

Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Mortality in randomized trials of antioxidant supplements for primary and secondary prevention: systematic review and meta-analysis.
    Bjelakovic G; Nikolova D; Gluud LL; Simonetti RG; Gluud C · JAMA · 2007
    Meta-analysis232,606 participants68 studies pooledGeneral Health forVitamin C
  2. Vitamin C intake and multiple health outcomes: an umbrella review of systematic reviews and meta-analyses.
    Xu K; Peng R; Zou Y; Jiang X; Sun Q; Song C · International journal of food sciences and nutrition · 2022
    Meta-analysis76 studies pooledGeneral Health forVitamin C
  3. Associations of Serum Biomarkers of Fruit and Vegetable Intake With the Risk of Cause-Specific Mortality and All-Cause Mortality: A National Prospective Cohort Study.
    Pu L; Zhang R; Wang X; Zhao T; Sun H; Han L · Frontiers in nutrition · 2022
    Cohort study12,530 participantsGeneral Health forVitamin C
  4. Efficacy of Vitamin C as Glucocorticoid Substitute for Reducing Pain and Inflammation After Total Hip Arthroplasty: A Randomized Controlled Trial.
    Jiang W; Xu H; Jiang X; Zhan Y; Ju Y; Xie J; Huang Z; Huang Q; Pei F · The Journal of bone and joint surgery. American volume · 2025
    Randomized trial107 participantsAnti-Inflammatory Support forVitamin C
  5. The Impact of Vitamin C on Analgesic, Anti-inflammatory, and Hemostatic Outcomes After Total Hip and Knee Arthroplasty: A Systematic Review and Meta-Analysis.
    Moftakhari Hajimirzaei S; Bagherzadeh Cham M; Dolikhani M; Tabatabaee SM; Ebrahimpour A · The archives of bone and joint surgery · 2026
    Meta-analysis1,162 participants10 studies pooledAnti-Inflammatory Support forVitamin C
  6. The impact of vitamin C supplementation on the perioperative outcomes after total hip and knee arthroplasty: a systematic review and meta-analysis.
    Liu X; Guo J; Li Y; Yang Y; Liu M; Gao Q; Yang Y; Wu X; Yue C · BMC musculoskeletal disorders · 2026
    Meta-analysis852 participants8 studies pooledAnti-Inflammatory Support forVitamin C
  7. Therapeutic Impact of Ascorbic Acid on Oral and Periodontal Tissues: A Systematic Literature Review.
    Ruzijevaite G; Acaite E; Jagelaviciene E · Medicina (Kaunas, Lithuania) · 2025
    Systematic review811 participants17 studies pooledAnti-Inflammatory Support forVitamin C
  8. Oral vitamin C administration reduces early recurrence rates after electrical cardioversion of persistent atrial fibrillation and attenuates associated inflammation.
    Korantzopoulos P; Kolettis TM; Kountouris E; Dimitroula V; Karanikis P; Pappa E; Siogas K; Goudevenos JA · International journal of cardiology · 2005
    Randomized trial44 participantsAnti-Inflammatory Support forVitamin C
  9. Dietary intake and blood concentrations of antioxidants and the risk of cardiovascular disease, total cancer, and all-cause mortality: a systematic review and dose-response meta-analysis of prospective studies.
    Aune D; Keum N; Giovannucci E; Fadnes LT; Boffetta P; Greenwood DC; Tonstad S; Vatten LJ; Riboli E; Norat T · The American journal of clinical nutrition · 2019
    Meta-analysis69 studies pooledGeneral Health forVitamin C
  10. Scientific Opinion on the substantiation of a health claim related to vitamin C and increasing non haem iron absorption pursuant to Article 14 of Regulation (EC) No 1924/2006.
    EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA) · EFSA journal. European Food Safety Authority · 2026
    Guideline / consensusGeneral Health forVitamin C
  11. Vitamin C Depletion and All-Cause Mortality in Renal Transplant Recipients.
    Sotomayor CG; Eisenga MF; Gomes Neto AW; Ozyilmaz A; Gans ROB; Jong WHA; Zelle DM; Berger SP; Gaillard CAJM; Navis GJ; Bakker SJ · Nutrients · 2018
    Cohort study598 participantsGeneral Health forVitamin C
  12. Relation between plasma ascorbic acid and mortality in men and women in EPIC-Norfolk prospective study: a prospective population study. European Prospective Investigation into Cancer and Nutrition.
    Khaw KT; Bingham S; Welch A; Luben R; Wareham N; Oakes S; Day N · Lancet (London, England) · 2001
    Cohort study19,496 participantsGeneral Health forVitamin C
  13. Vitamin C and contribution to the normal function of the immune system: evaluation of a health claim pursuant to Article 14 of Regulation (EC) No 1924/2006.
    EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA) · EFSA journal. European Food Safety Authority · 2026
    Guideline / consensusImmunity forVitamin C
  14. Therapeutic effects of high-dose vitamin C supplementation in patients with COVID-19: a meta-analysis.
    Sun L; Zhao JH; Fan WY; Feng B; Liu WW; Chen RQ; Ban C; Dang AG; Wang M; Luo KT; Zhou GY; Yu FF; Ba Y · Nutrition reviews · 2024
    Meta-analysis2,334 participants14 studies pooledImmunity forVitamin C
  15. Effect of micronutrient supplements on influenza and other respiratory tract infections among adults: a systematic review and meta-analysis.
    Abioye AI; Bromage S; Fawzi W · BMJ global health · 2021
    Meta-analysisImmunity forVitamin C
  16. New evidence for antioxidant properties of vitamin C.
    Vojdani A; Bazargan M; Vojdani E; Wright J · Cancer detection and prevention · 2001
    Randomized trial20 participantsImmunity forVitamin C
  17. Enhanced Vitamin C Delivery: A Systematic Literature Review Assessing the Efficacy and Safety of Alternative Supplement Forms in Healthy Adults.
    Calder PC; Kreider RB; McKay DL · Nutrients · 2025
    Systematic review13 studies pooledImmunity forVitamin C
  18. Evaluation of the anti-wrinkle effect of an ascorbic acid-loaded dissolving microneedle patch via a double-blind, placebo-controlled clinical study.
    Lee C; Yang H; Kim S; Kim M; Kang H; Kim N; An S; Koh J; Jung H · International journal of cosmetic science · 2017
    Randomized trial23 participantsSkin Health forVitamin C
  19. Comparative Study on the Outcome of Periorbital Wrinkles Treated with Laser-Assisted Delivery of Vitamin C or Vitamin C Plus Growth Factors: A Randomized, Double-blind, Clinical Trial.
    Machado BHB; Frame J; Zhang J; Najlah M · Aesthetic plastic surgery · 2021
    Randomized trial149 participantsSkin Health forVitamin C
  20. Randomized trial of topical ascorbic acid in DMSO versus imiquimod for the treatment of basal cell carcinoma.
    Burke B; Bailie JE · Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie · 2022
    Randomized trial25 participantsSkin Health forVitamin C
  21. Vitamin C improves healing of foot ulcers: a randomised, double-blind, placebo-controlled trial.
    Gunton JE; Girgis CM; Lau T; Vicaretti M; Begg L; Flood V · The British journal of nutrition · 2022
    Randomized trial16 participantsSkin Health forVitamin C
  22. Dietary nutrient intakes and skin-aging appearance among middle-aged American women.
    Cosgrove MC; Franco OH; Granger SP; Murray PG; Mayes AE · The American journal of clinical nutrition · 2007
    Cross-sectional study4,025 participantsSkin Health forVitamin C
  23. Role of Oral Vitamin 'C' on Astigmatic Errors in Phacoemulsification.
    Mohan S; Sah K; Khattri M; Ahmad L; Sachan SK · Current eye research · 2021
    Randomized trial400 participantsVision Support forVitamin C
  24. Ascorbic acid metabolites are involved in intraocular pressure control in the general population.
    Hysi PG; Khawaja AP; Menni C; Tamraz B; Wareham N; Khaw KT; Foster PJ; Benet LZ; Spector TD; Hammond CJ · Redox biology · 2019
    Observational studyVision Support forVitamin C
  25. Nutritional modulation of cataract.
    Weikel KA; Garber C; Baburins A; Taylor A · Nutrition reviews · 2014
    Narrative reviewVision Support forVitamin C
  26. Dietary n-3 Fatty Acid, α-Tocopherol, Zinc, vitamin D, vitamin C, and β-carotene are Associated with Age-Related Macular Degeneration in Japan.
    Aoki A; Inoue M; Nguyen E; Obata R; Kadonosono K; Shinkai S; Hashimoto H; Sasaki S; Yanagi Y · Scientific reports · 2017
    Case-control study530 participantsVision Support forVitamin C
  27. Adherence to a Mediterranean diet, lifestyle and age-related macular degeneration: the Coimbra Eye Study - report 3.
    Raimundo M; Mira F; Cachulo MDL; Barreto P; Ribeiro L; Farinha C; Laíns I; Nunes S; Alves D; Figueira J; Merle BM; Delcourt C; Santos L; Silva R · Acta ophthalmologica · 2019
    Case-control study883 participantsVision Support forVitamin C