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Vitamin C 1000 mg

4.8
★ ★ ★ ★ ★
(1022 ratings)
Vitamin C 1000 mg
Product Image
Score76
High-dose vitamin C gains a useful but modest bioflavonoid addition. Ambiguous source labeling and ordinary ascorbic acid limit the formulation.
How scoring works
Capsule
Quantity:250 VegCap(s) • (250 servings)
Goals:
Skin Health
Immunity
General Health
Anti-Inflammatory Support
Vision Support

Score 76

High-dose vitamin C gains a useful but modest bioflavonoid addition. Ambiguous source labeling and ordinary ascorbic acid limit the formulation.
How scoring works
$31.99($0.12 per serving)
Vitacost
$ 31.99
iHerb
$ 31.99
Pure Formulas
$ 31.99
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Analysis

The capsule supplies 1,000 mg vitamin C for antioxidant defenses, normal immune function, and collagen formation. A modest citrus bioflavonoid concentrate adds a complementary plant-antioxidant component.

The label repeats the vitamin C amount across ascorbic acid, acerola, and rose hip rather than showing each contribution. The bioflavonoid concentrate is quantified, but its individual compounds or standardization are not disclosed.

The formula fits users wanting high-dose vitamin C with a small flavonoid addition. Plain ascorbic acid offers no buffering or enhanced delivery, and the blend remains too narrow to serve as a comprehensive skin, immune, or vision formula.

Who is it for
  • Adults wanting vitamin C with bioflavonoids
  • Capsule users seeking antioxidant support
  • People comfortable with high-dose ascorbic acid
Best for
  • Antioxidant support
  • Collagen synthesis
  • Focused immune nutrition

Pros

  • Substantial vitamin C serving
  • Quantified citrus bioflavonoid concentrate
  • Focused capsule formula
  • Long serving supply

Cons

  • Vitamin C source split is unclear
  • Bioflavonoids are not standardized
  • Unbuffered ascorbic acid
  • Limited pathway breadth

Warnings

  • The 1,000 mg serving may cause nausea, cramping, or loose stools.
  • People prone to calcium oxalate kidney stones may find regular high-dose use unsuitable.
  • Citrus-derived ingredients may not suit users with a specific citrus sensitivity.

Nutrient quality

84 Highest impact

The high amount and relevant citrus bioflavonoids provide meaningful, focused support. Standard ascorbic acid and ambiguous source quantities limit confidence in the full formulation.

.

Ingredient transparency

60 Moderate impact

Vitamin C sources and citrus bioflavonoids are recognizable without a named proprietary blend. Repeated quantities, absent excipients, and missing use directions limit a precise assessment.

.

Customer satisfaction

71 High impact

The aggregate satisfaction signal is strong and supported by extensive volume. Missing review details prevent assessment of recurring complaints or purpose fit.

.

Value for money

93 Highest impact

Excellent serving value and a relevant bioflavonoid addition support competitiveness. Ambiguous source quantities keep the formula from standing out on clarity.

.
Report analysis

Goals

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 protection in skin. The listed 1,000 mg amount provides strong depth, while a modest bioflavonoid concentrate adds complementary antioxidant support.

Standard capsule delivery is practical, but repeated 1,000 mg entries across acerola, ascorbic acid, and rose hip make the total source contribution ambiguous. The formula does not add collagen peptides or barrier lipids.

Study evidence
Vitamin C Supportive 53 studies
Immunity
Immunity
Impact
Highest effect
A Goal FitB+ Strength of SupportC CoverageB Formula Quality
Vitamin C · 1000 mg

The timed-release formula supplies a substantial vitamin C amount with citrus bioflavonoids, acerola, and rose hip sources. Vitamin C directly supports immune-cell activity and helps limit oxidative stress.

The three vitamin C source entries repeat the same total without showing their separate contributions. Bioflavonoids add a complementary antioxidant element, but plain ascorbic acid may still irritate a sensitive stomach.

Study evidence
Vitamin C Supportive 53 studies
General Health
General Health
Impact
High effect
A Goal FitB Strength of SupportC CoverageB+ Formula Quality
Vitamin C · 1000 mg

Vitamin C supports foundational antioxidant defenses, collagen formation, and normal immune function. The formula supports antioxidant, collagen, and immune pathways but does not fill a broad range of nutrient gaps.

The label presents a substantial 1,000 mg vitamin C serving suited to focused antioxidant support. Ascorbic acid is clearly identified, but the botanical additions do not establish enhanced absorption or buffering.

Study evidence
Vitamin C Supportive 56 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 substantial antioxidant support, with citrus bioflavonoids adding a complementary flavonoid component. The 1,000 mg vitamin amount is meaningful for daily use.

The 50 mg bioflavonoid concentrate is modest and lacks constituent standardization. The formula remains focused on oxidative stress rather than direct inflammatory-enzyme pathways.

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

Vitamin C contributes antioxidant support used within established multi-nutrient vision formulas. A vegetable capsule provides a substantial amount, but vitamin C alone has limited evidence for broad vision support.

A small citrus bioflavonoid addition provide secondary antioxidant support, though the formula still lacks macular pigments and omega-3 fats. The product is better viewed as general antioxidant support than a complete eye formula.

Study evidence
Vitamin C Disputed 24 studies

Ingredients

IngredientAmount per serving
Vitamin C (Acerola Cherry, Ascorbic Acid, Rose Hip)
 1000 mg
Bioflavonoid Concentrate (Citrus)
 50 mg
Adults 18–50
Report overview
Vitamin C (Acerola Cherry, Ascorbic Acid, Rose Hip) · 1000 mg OverallScore68
F Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyB+ Value

The capsule provides 1,000 mg of vitamin C with acerola, rose hip, and a small citrus bioflavonoid concentrate. Its main form is generic ascorbic acid without sustained delivery or buffering. Cost efficiency is good for a straightforward high-dose capsule with plant cofactors.

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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 vitamin C 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 vitamin C 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 vitamin C 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 vitamin C 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

Buffered Gold C

California Gold Nutrition
A lower serving cost comes with 1,000 mg of vitamin C as sodium ascorbate with 130 mg of sodium, compared with the original 1000 mg vitamin C formula. the simple buffered formula provides a full amount with no unrelated active ingredients, although the sodium contribution needs consideration on a restricted diet.
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 vitamin C formula. the fully buffered powder provides a substantial, clearly disclosed amount, although careful measuring and sodium accounting remain important.
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 vitamin C 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 vitamin C 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.
87 Value

100% Pure Vitamin C Powder

Swanson Premium Brand
A stronger quality-to-cost balance comes from 1,000 mg of pure ascorbic acid in a flexible powder. Compared with the original 1000 mg vitamin C formula, the single-active formula provides a full vitamin C amount without decorative ingredients, while plain ascorbic acid may be less comfortable for sensitive stomachs.
Report alternatives

Sources

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

  1. 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
  2. Supplemental Vitamins and Minerals for Cardiovascular Disease Prevention and Treatment: JACC Focus Seminar.
    Jenkins DJA; Spence JD; Giovannucci EL; Kim YI; Josse RG; Vieth R; Sahye-Pudaruth S; Paquette M; Patel D; Blanco Mejia S; Viguiliouk E; Nishi SK; Kavanagh M; Tsirakis T; Kendall CWC; Pichika SC; Sievenpiper JL · Journal of the American College of Cardiology · 2021
    Meta-analysisGeneral Health forVitamin C
  3. 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
  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. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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
  16. 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
  17. 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
  18. 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
  19. 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
  20. 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
  21. 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
  22. 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
  23. 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
  24. 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
  25. 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
  26. 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
  27. 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
  28. 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
  29. 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
  30. Nutritional modulation of cataract.
    Weikel KA; Garber C; Baburins A; Taylor A · Nutrition reviews · 2014
    Narrative reviewVision Support forVitamin C
  31. 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
  32. 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