Product Image

Vitamin C Quali-C

4.7
★ ★ ★ ★ ★
(80170 ratings)
Vitamin C 1000 mg
Product Image
Score83
A strong-value 1,000 mg vitamin C capsule using branded Quali-C. Clear source disclosure is useful, but the form is still unbuffered.
How scoring works
Capsule
Quantity:60 Capsule(s) • (60 servings)
Goals:
Immunity
General Health
Vision Support
Skin Health
Anti-Inflammatory Support

Score 83

A strong-value 1,000 mg vitamin C capsule using branded Quali-C. Clear source disclosure is useful, but the form is still unbuffered.
How scoring works

Also available as

1 option
365 servings C 1000 mg • 365 Capsule(s) • 365 servings $40.88 ($0.11 per serving)
$8.57($0.14 per serving)
iHerb
$ 8.57
iHerb
$ 8.57
Report prices

Analysis

The 1,000 mg serving supplies substantial vitamin C for antioxidant, immune, and collagen-related nutrition. Quali-C identifies a branded source, adding more traceability than a generic ascorbic acid listing.

The source branding does not make the vitamin buffered or sustained release. Sensitive users may still prefer a mineral ascorbate or a lower amount taken in divided servings.

Strong value and a focused capsule format make it practical for users who want provenance without paying heavily for it. Missing other-ingredient details remain the main transparency gap.

Who is it for
  • Users who value branded ingredient sourcing
  • Adults seeking a high-potency capsule
  • Value-conscious shoppers
Best for
  • Traceable daily vitamin C
  • High-potency antioxidant support
  • Simple capsule routines

Pros

  • Branded Quali-C source
  • Full 1,000 mg serving
  • Focused single-active design
  • Strong value

Cons

  • Unbuffered form
  • No sustained release
  • Complete excipients are not supplied

Warnings

  • The 1,000 mg serving may cause nausea, reflux, or loose stools
  • People with calcium oxalate kidney stone risk should discuss high-dose use with a clinician
  • Check the physical label for excipients if you have capsule or additive sensitivities

Nutrient quality

83 Highest impact

Quali-C provides source traceability but remains an unbuffered ascorbic acid form. The substantial amount is meaningful and the single-active formula stays focused.

Ingredient transparency

81 Highest impact

The active amount and branded source are clearly identified. Daily directions and a complete inactive-ingredient list are not supplied.

Customer satisfaction

73 High impact

The aggregate rating is very strong and supported by exceptional volume. No review excerpts are supplied, so repeated complaints and purpose-specific experiences cannot be assessed.

Value for money

96 Highest impact

The branded source and substantial serving are offered at excellent value. The focused formula avoids extras, although it lacks buffering or advanced delivery.

Report analysis

Goals

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

A fully disclosed branded vitamin C source provides direct antioxidant and immune-cell support at a useful amount. The evidence base is strong, although the unbuffered form may be uncomfortable for sensitive stomachs.

The formula offers excellent depth for vitamin C but does not address other immune pathways such as barrier nutrients or zinc status. Its single-active design is transparent and free from distracting additions.

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

A substantial branded vitamin C serving supports antioxidant protection, normal immune function, and collagen production. Clear source disclosure strengthens confidence in the main active.

Unbuffered ascorbic acid may cause stomach irritation in sensitive users. The focused capsule does not address broader foundational vitamin, mineral, or fatty-acid needs.

Study evidence
Vitamin C Supportive 56 studies
Vision Support
Vision Support
Impact
High effect
B Goal FitA Strength of SupportD+ CoverageA Formula Quality
Vitamin C · 1000 mg

Vitamin C provides relevant antioxidant support for the lens and retina and contributes to established multi-nutrient eye formulas. Used alone, it cannot replace macular carotenoids, vitamin E, zinc, or omega-3 support.

The branded Quali-C ascorbic acid form supplies a substantial disclosed amount. The focused formula is easy to assess but remains narrow for comprehensive vision support.

Study evidence
Vitamin C Disputed 24 studies
Skin Health
Skin Health
Impact
High effect
B- Goal FitA- Strength of SupportC CoverageA- Formula Quality
Vitamin C · 1000 mg

Branded Quali-C provides a substantial amount for normal collagen synthesis and antioxidant defense. Clear source disclosure supports quality, although unbuffered ascorbic acid may be less comfortable for sensitive stomachs.

The single ingredient offers strong depth for one nutrient but no collagen, ceramides, or direct hydration active. Its focused design avoids padding while remaining narrow for comprehensive skin 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

A substantial, traceable vitamin C source provides focused antioxidant support. Vitamin C is an indirect inflammation tool rather than a direct pathway inhibitor.

It fits general antioxidant support better than comprehensive inflammation management. The high amount may cause digestive upset in sensitive users.

Study evidence
Vitamin C Supportive 50 studies

Ingredients

IngredientAmount per serving
Vitamin C (Quali-C)
 1000 mg
Gluten Free Adults 18–50 Dairy Free
Report overview
Vitamin C (Quali-C) · 1000 mg OverallScore74
D- Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyA+ Value

The branded Quali-C form provides a well-targeted amount with clear source disclosure and strong cost efficiency. Unbuffered ascorbic acid offers less digestive comfort than mineral ascorbates or advanced delivery systems. Complete other-ingredient details are absent, so excipient purity cannot be fully confirmed.

View ingredientView products
Loading alternative details
89 Performance

Pure Buffered Calcium Ascorbate

NOW
A more performance-focused option combines 890 mg of vitamin C as Calcium Ascorbate with 100 mg of Calcium. Compared with the original's 1,000 mg of vitamin C as Quali-C, the smaller amount favors moderate daily use but provides less vitamin C per serving.
88 Performance

Buffered Gold C

California Gold Nutrition
A more performance-focused option combines 1,000 mg of vitamin C as Sodium Ascorbate with a focused single-nutrient formula. The amount matches the original, while Sodium Ascorbate replaces Quali-C and gives users a different disclosed form.
85 Performance

Ester-C Plus 1000 mg Vitamin C

Solgar
A more performance-focused option combines 1,000 mg of vitamin C as Ester-C with 108 mg of Calcium and 200 mg of Citrus Bioflavonoids Complex. The amount matches the original, while Ester-C replaces Quali-C and gives users a different disclosed form.
86 Budget

C

Swanson
The lower serving cost still provides 1,000 mg of vitamin C as Calcium Ascorbate with 120 mg of Calcium and 200 mg of Bioflavonoids. The amount matches the original, while Calcium Ascorbate replaces Quali-C and gives users a different disclosed form.
87 Budget

Pure Buffered Magnesium Ascorbate

NOW
The lower serving cost still provides 820 mg of vitamin C as Magnesium Ascorbate with 60 mg of Magnesium. Compared with the original's 1,000 mg of vitamin C as Quali-C, the smaller amount favors moderate daily use but provides less vitamin C per serving.
88 Budget

Sodium Ascorbate Capsules

NutriBiotic Immunity
The lower serving cost still provides 850 mg of vitamin C as Sodium Ascorbate with a focused single-nutrient formula. Compared with the original's 1,000 mg of vitamin C as Quali-C, the smaller amount favors moderate daily use but provides less vitamin C per serving.
85 Value

C-500 With Rose Hips

NOW
The favorable serving cost pairs 500 mg of vitamin C as Ascorbic Acid with 40 mg of Rose Hips powder. Compared with the original's 1,000 mg of vitamin C as Quali-C, the smaller amount favors moderate daily use but provides less vitamin C per serving.
88 Value

Sodium Ascorbate

NutriBiotic Immunity
The favorable serving cost pairs 1,100 mg of vitamin C as Sodium Ascorbate with a focused single-nutrient formula. Compared with the original's 1,000 mg of vitamin C as Quali-C, the larger disclosed amount may better fit users seeking higher-potency vitamin C.
87 Value

100% Pure Vitamin C Powder

Swanson Premium Brand
The favorable serving cost pairs 1,000 mg of vitamin C as Ascorbic Acid with a focused single-nutrient formula. The amount matches the original, while Ascorbic Acid replaces Quali-C and gives users a different disclosed form.
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. 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
  3. 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
  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. 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. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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
  16. 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
  17. 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
  18. 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
  19. 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
  20. 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
  21. 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
  22. 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
  23. 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
  24. 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
  25. 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
  26. Nutritional modulation of cataract.
    Weikel KA; Garber C; Baburins A; Taylor A · Nutrition reviews · 2014
    Narrative reviewVision Support forVitamin C
  27. 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
  28. 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