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Vitamin C 1000 mg

4.8
★ ★ ★ ★ ★
(3444 ratings)
Vitamin C 1000 mg
Product Image
Score81
A clean, fully disclosed vitamin C capsule with a practical high-strength amount. Unbuffered acidity and narrow pathway coverage are the key trade-offs.
How scoring works
Capsule
Quantity:100 Capsule(s) • (100 servings)
Goals:
General Health
Immunity
Skin Health
Anti-Inflammatory Support
Vision Support

Score 81

A clean, fully disclosed vitamin C capsule with a practical high-strength amount. Unbuffered acidity and narrow pathway coverage are the key trade-offs.
How scoring works

Also available as

2 options
500 mg • 250 Capsule(s) servings C 500 mg • 250 Capsule(s) • 250 servings $21.47 ($0.08 per serving) 500 mg • 100 Capsule(s) servings C 500 mg • 100 Capsule(s) • 100 servings $9.26 ($0.09 per serving)
$14.51($0.14 per serving)
Vitacost
$ 14.99
iHerb
$ 14.51
Pure Formulas
$ 15.37
Daily Vita
$ 16.91
Report prices

Analysis

The 1,000 mg capsule provides substantial support for antioxidant defenses, normal immune function, and collagen formation. A single active makes the product easy to evaluate and avoids decorative blends.

Plain L-ascorbic acid is established and clearly named, but it remains acidic. Sensitive users may prefer a buffered source or a divided amount.

The formula offers strong vitamin C depth and good value without pretending to cover every wellness pathway. It is a better fit for a specific nutrient need than for broad skin, vision, or immune coverage.

Who is it for
  • Adults seeking a simple vitamin C capsule
  • Users avoiding multi-ingredient blends
  • People wanting a fully disclosed active amount
Best for
  • Focused vitamin C support
  • Collagen formation
  • Antioxidant and immune support

Pros

  • Single active ingredient
  • Clear 1,000 mg amount
  • No proprietary blend
  • Strong serving value

Cons

  • No buffering
  • No enhanced-delivery system
  • Narrow single-nutrient coverage
  • May be more than needed for routine intake

Warnings

  • The unbuffered amount may cause stomach discomfort or loose stools
  • People prone to calcium oxalate kidney stones should consider total vitamin C intake
  • Taking the full serving at once may be uncomfortable for sensitive users

Nutrient quality

84 Highest impact

Ordinary ascorbic acid is established but offers no buffering or enhanced delivery. The serving is below the adult upper limit, though the amount may bother sensitive stomachs.

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

82 Highest impact

Serving value appears reasonable but not exceptional. The focused ingredient profile avoids costly low-value extras.

Report analysis

Goals

General Health
General Health
Impact
Highest effect
A Goal FitA- Strength of SupportC+ CoverageA Formula Quality
Vitamin C · 1000 mg

Vitamin C supports antioxidant defenses, immune function, and collagen formation. The 1,000 mg amount is well targeted and fully disclosed, though plain unbuffered ascorbic acid offers no special delivery benefit.

The single-nutrient formula provides strong depth for vitamin C rather than broad wellness coverage. Its clean, direct design avoids proprietary blends, but acidity may be uncomfortable for sensitive users.

Study evidence
Vitamin C Supportive 56 studies
Immunity
Immunity
Impact
Highest effect
A+ Goal FitB+ Strength of SupportC CoverageA+ Formula Quality
Vitamin C · 1000 mg

A well-targeted vitamin C amount supports antioxidant defenses, epithelial barriers, and normal immune function. The single active is fully disclosed and easy to assess.

Unbuffered L-ascorbic acid may be less comfortable for sensitive stomachs. The focused formula has strong depth but leaves zinc, vitamin D, and other immune pathways uncovered.

Study evidence
Vitamin C Supportive 53 studies
Skin Health
Skin Health
Impact
Highest effect
A Goal FitA- Strength of SupportC+ CoverageA+ Formula Quality
Vitamin C · 1000 mg

A fully disclosed 1,000 mg vitamin C serving supports collagen synthesis and antioxidant protection. The amount is meaningful for maintaining an essential skin-related nutrient.

The single-ingredient formula is streamlined and avoids decorative blends. Plain L-ascorbic acid remains unbuffered, so people with sensitive stomachs may prefer a gentler form.

Study evidence
Vitamin C Supportive 53 studies
Anti-Inflammatory Support
Anti-Inflammatory Support
Impact
High effect
B- Goal FitB- Strength of SupportC CoverageA+ Formula Quality
Vitamin C · 1000 mg

Vitamin C provides meaningful antioxidant support that may help manage oxidative inflammatory stress. The amount is well targeted, but unbuffered L-ascorbic acid offers no delivery or stomach-tolerance advantage.

The single-ingredient design is transparent and supplies useful depth for antioxidant defense. Its main limitation is narrow pathway coverage rather than inadequate dosing.

Study evidence
Vitamin C Supportive 50 studies
Vision Support
Vision Support
Impact
High effect
B Goal FitB+ Strength of SupportD CoverageA- Formula Quality
Vitamin C · 1000 mg

Vitamin C provides relevant antioxidant support for the lens and retina, and the 1,000 mg amount is clearly stated. Its strongest clinical context is as one part of a broader ocular nutrient combination rather than as a complete vision formula.

Unbuffered L-ascorbic acid is clearly labeled but offers no enhanced delivery or stomach-comfort feature. The single-ingredient capsule is clean and focused, but it leaves all non-antioxidant ocular pathways uncovered.

Study evidence
Vitamin C Disputed 24 studies

Ingredients

IngredientAmount per serving
Vitamin C (L-Ascorbic Acid)
 1000 mg
Gluten Free Adults 18–50 Vegan Kosher Sugar Free Vegetarian
Report overview
Vitamin C (L-Ascorbic Acid) · 1000 mg OverallScore64
F Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyB+ Value

The dose is well targeted and the vitamin C amount is clear. Ordinary unbuffered ascorbic acid offers no delivery or stomach-comfort advantage. Cost efficiency is favorable.

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. Effect of Vitamin C Supplements on Respiratory Tract Infections: A Systematic Review and Meta-Analysis.
    Keya TA; Leela A; Fernandez K; Habib N; Rashid M · Current reviews in clinical and experimental pharmacology · 2022
    Meta-analysis10 studies pooledImmunity forVitamin C
  2. 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
  3. The effect of macronutrient and micronutrient supplements on COVID-19: an umbrella review.
    SeyedAlinaghi S; Shahidi R; Mojdeganlou H; Akhtaran FK; Maroufi SF; Maroufi SP; Mirzapour P; Karimi A; Khodaei S; Pour MM; Mehraeen E; Dadras O · Journal of health, population, and nutrition · 2024
    Systematic review28 studies pooledImmunity forVitamin C
  4. 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
  5. Double-blind, half-face study comparing topical vitamin C and vehicle for rejuvenation of photodamage.
    Fitzpatrick RE; Rostan EF · Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.] · 2002
    Non-randomized trial10 participantsSkin Health forVitamin C
  6. What did we learn in 35 years of research on nutrition and supplements for age-related macular degeneration: a systematic review.
    Pameijer EM; Heus P; Damen JAA; Spijker R; Hooft L; Ringens PJ; Imhof SM; van Leeuwen R · Acta ophthalmologica · 2023
    Systematic review27 studies pooledVision Support forVitamin C
  7. Antioxidant vitamin and mineral supplements for preventing age-related macular degeneration.
    Evans JR; Lawrenson JG · The Cochrane database of systematic reviews · 2018
    Meta-analysis55,614 participants4 studies pooledVision Support forVitamin C
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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
  16. 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
  17. 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
  18. 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
  19. 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
  20. 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
  21. 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
  22. 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
  23. 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
  24. 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
  25. 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
  26. 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
  27. 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
  28. Nutritional modulation of cataract.
    Weikel KA; Garber C; Baburins A; Taylor A · Nutrition reviews · 2014
    Narrative reviewVision Support forVitamin C
  29. 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
  30. 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