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C 1000 mg

Nature's Bounty
4.7
★ ★ ★ ★ ★
(2359 ratings)
Vitamin C 1000 mg
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Score84

A simple high-dose vitamin C tablet with excellent serving value. Digestive tolerance and missing excipient detail are the main points to consider.

How scoring works
Quantity:300 Tablet(s) • (300 servings)
Goals:
General Health
Immunity
Skin Health
Anti-Inflammatory Support
Vision Support

Score 84

A simple high-dose vitamin C tablet with excellent serving value. Digestive tolerance and missing excipient detail are the main points to consider.

How scoring works

Also available as

3 options
500mg • 250 Tablet(s) servings C 500 mg • 250 Tablet(s) • 250 servings $8.50 ($0.03 per serving) 100 servings C 1000 mg • 100 Tablet(s) • 100 servings $6.97 ($0.06 per serving) 500mg • 100 Tablet(s) servings C 500 mg • 100 Tablet(s) • 100 servings $6.69 ($0.06 per serving)
$16.71($0.05 per serving)
Vitacost
$ 33.94
Walmart
$ 16.71
iHerb
$ 33.94
Report prices

Analysis

The tablet provides 1,000 mg of vitamin C for antioxidant, immune, and collagen support. Its single-active design is simple and easy to understand.

Plain ascorbic acid does not add buffering or advanced delivery. The supplied data also omit the complete tablet excipient panel.

A very large serving supply makes the product particularly practical for regular users. It offers strong depth in vitamin C while leaving other eye, skin, and general-health nutrient pathways uncovered.

Who is it for
  • Regular high-dose vitamin C users
  • Adults preferring tablets
  • People seeking a large, economical supply
Best for
  • Routine vitamin C intake
  • Immune support
  • Antioxidant and collagen support

Pros

  • Clearly stated 1,000 mg amount
  • Single-active formula
  • Very large serving supply
  • Excellent practical value

Cons

  • Unbuffered ascorbic acid
  • Full excipient list is not supplied
  • No complementary nutrients

Warnings

  • A 1,000 mg serving may cause digestive upset or diarrhea
  • People prone to calcium-oxalate kidney stones should discuss regular high-dose use with a clinician
  • Review the full package label if tablet excipients matter to you

Nutrient quality

86 Highest impact

Meaningful vitamin C dosing and a focused formula support the intended use. The unbuffered form offers no absorption or stomach-comfort advantage.

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Ingredient transparency

83 Highest impact

Active ingredients and their amounts are clear, with no proprietary blend hiding key doses. Daily directions and a complete other-ingredients panel are not included in the supplied data.

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Customer satisfaction

70 High impact

The aggregate rating is strong and supported by solid feedback volume. Complaint-level experiences are unavailable, so repeated drawbacks and purpose fit remain uncertain.

.

Value for money

97 Highest impact

Meaningful servings and strong economy provide practical value. Remaining formula limitations do little to outweigh the low serving cost.

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Report analysis

Goals

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

Vitamin C provides direct antioxidant, immune, and collagen support at a substantial amount. The simple one-ingredient design is fully disclosed and supported by established nutritional science.

The formula is narrow and does not address other common nutritional gaps or energy pathways. A 1,000 mg ascorbic acid serving can cause diarrhea or stomach upset and may be unsuitable for people prone to calcium-oxalate kidney stones.

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

Vitamin C provides direct support for immune-cell function and antioxidant defense. The 1,000 mg amount is substantial and meets the goal-specific target.

Plain ascorbic acid is well established but does not offer the buffering of gentler forms. A large single serving may cause digestive upset in sensitive users.

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

Vitamin C directly supports collagen synthesis and antioxidant defense in skin. Vitamin C has established human and mechanistic evidence for collagen formation and antioxidant protection.

The clearly disclosed 1,000 mg vitamin C amount provides more than enough collagen-synthesis cofactor for most users. Vitamin C covers collagen synthesis and antioxidant defense but not direct hydration or barrier-lipid support.

Study evidence
Vitamin C Supportive 53 studies
Anti-Inflammatory Support
Anti-Inflammatory Support
Impact
High effect
C Goal FitA- Strength of SupportD CoverageA Formula Quality
Vitamin C · 1000 mg

Vitamin C provides strong antioxidant capacity that may indirectly support inflammatory balance. The 1,000 mg serving is substantial, but it does not directly target NF-kB, COX-2, or 5-LOX pathways.

The single-active formula is transparent and free of unnecessary additions, although plain ascorbic acid offers no specialized delivery. The high amount may cause nausea or diarrhea, and people prone to calcium-oxalate kidney stones may increase urinary oxalate with regular use.

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

Vitamin C provides meaningful antioxidant support for the lens and other ocular tissues. The disclosed amount is substantial enough to contribute rather than merely decorate the label.

Its strongest vision evidence comes from use within broader nutrient combinations. The formula does not supply macular carotenoids, retinal omega-3s, or balanced zinc and copper.

Study evidence
Vitamin C Disputed 24 studies

Ingredients

IngredientAmount per serving
Vitamin C (Ascorbic Acid)
 1000 mg
Gluten Free Adults 18–50 Dairy Free Sugar Free Vegetarian
Report overview
Vitamin C (Ascorbic Acid) · 1000 mg OverallScore68
F Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyA+ Value

The 1,000 mg serving is well targeted and straightforward. Generic ascorbic acid provides no buffering or absorption-focused delivery, and the full excipient list is not supplied. Exceptionally low cost per gram is the main advantage.

View ingredientView products
Loading alternative details
86 Performance

Ester-C Plus 1000 mg Vitamin C

Solgar
Ingredient and delivery quality improve with 1,000 mg of buffered Ester-C with 108 mg of calcium and 200 mg of citrus bioflavonoids. Compared with the original 1000 mg ascorbic-acid formula, the substantial buffered dose and compatible bioflavonoids broaden support beyond plain ascorbic acid, although complete excipient details are not supplied.
86 Performance

C

Swanson
Ingredient and delivery quality improve with 1,000 mg of calcium ascorbate with 120 mg of calcium and 200 mg of citrus bioflavonoids. Compared with the original 1000 mg ascorbic-acid formula, the buffered form and meaningful bioflavonoid amount offer a broader formula than plain ascorbic acid, although complete excipient details are not supplied.
84 Performance

Ester-C 24 Hour Immune Support 1000 mg

NatureSmart
Ingredient and delivery quality improve with 1,000 mg of buffered Ester-C with 110 mg of calcium and 102 mg of citrus bioflavonoids. Compared with the original 1000 mg ascorbic-acid formula, the buffered form and bioflavonoids combine stomach-comfort potential with a focused vitamin C dose, although the supplied data do not include the complete inactive-ingredient panel.
89 Budget

Pure Buffered Calcium Ascorbate

NOW
A lower serving cost comes with 890 mg of vitamin C as buffered calcium ascorbate with 100 mg of calcium, compared with the original 1000 mg ascorbic-acid formula. the mineral-bound form may be gentler than plain ascorbic acid and keeps the active formula focused, although the full inactive-ingredient panel is not supplied.
88 Budget

Sodium Ascorbate

NutriBiotic Immunity
A lower serving cost comes with 1,100 mg of vitamin C as sodium ascorbate with 120 mg of sodium, compared with the original 1000 mg ascorbic-acid formula. the fully buffered powder provides a substantial, clearly disclosed amount, although careful measuring and sodium accounting remain important.
87 Budget

100% Pure Vitamin C Powder

Swanson Premium Brand
A lower serving cost comes with 1,000 mg of pure ascorbic acid in a flexible powder, compared with the original 1000 mg ascorbic-acid formula. the single-active formula provides a full vitamin C amount without decorative ingredients, although plain ascorbic acid may be less comfortable for sensitive stomachs.
88 Value

Buffered Gold C

California Gold Nutrition
A stronger quality-to-cost balance comes from 1,000 mg of vitamin C as sodium ascorbate with 130 mg of sodium. Compared with the original 1000 mg ascorbic-acid formula, the simple buffered formula provides a full amount with no unrelated active ingredients, while the sodium contribution needs consideration on a restricted diet.
87 Value

Pure Buffered Magnesium Ascorbate

NOW
A stronger quality-to-cost balance comes from 820 mg of vitamin C as magnesium ascorbate with 60 mg of magnesium. Compared with the original 1000 mg ascorbic-acid formula, full buffering combines a meaningful vitamin C amount with clear mineral disclosure, while complete use directions and inactive ingredients are not supplied.
84 Value

Ester-C 500 mg With Citrus Bioflavoinds

American Health
A stronger quality-to-cost balance comes from 1,000 mg of buffered Ester-C with a broad citrus bioflavonoid complex. Compared with the original 1000 mg ascorbic-acid formula, the formula adds several named citrus compounds while maintaining a substantial vitamin C amount, while the repeated complex entries make the exact internal amounts difficult to interpret.
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. Vitamin C supplementation in kidney failure: effect on uraemic symptoms.
    Singer RF · Nephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association · 2011
    Randomized trial99 participantsGeneral Health forVitamin C
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. Vitamin C and postoperative outcomes following mandibular third molar extraction: a randomized split-mouth study.
    Demirel M; Aktas A; Kizil M; Yalcin N · Oral surgery, oral medicine, oral pathology and oral radiology · 2026
    Randomized trial56 participantsSkin Health forVitamin C
  10. 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
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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
  16. 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
  17. 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
  18. 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
  19. 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
  20. 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
  21. 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
  22. 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
  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. 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
  29. Nutritional modulation of cataract.
    Weikel KA; Garber C; Baburins A; Taylor A · Nutrition reviews · 2014
    Narrative reviewVision Support forVitamin C
  30. 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
  31. 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