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Ascorbic Acid 100% Pure Vitamin C

4.8
★ ★ ★ ★ ★
(12443 ratings)
Vitamin C 2000 mg
Product Image
Score82
A concentrated, adjustable vitamin C powder with a simple ingredient profile. The full serving is unnecessarily high for many people.
How scoring works
Powder
Quantity:16 Ounce(s) • (227 servings)
Goals:
Anti-Inflammatory Support
General Health
Immunity
Vision Support
Skin Health

Score 82

A concentrated, adjustable vitamin C powder with a simple ingredient profile. The full serving is unnecessarily high for many people.
How scoring works

Also available as

2 options
2 servings C 2000 mg • 2 lb(s) • 500 servings $40.49 ($0.08 per serving) 8 servings C 2000 mg • 8 Ounce(s) • 113 servings $11.24 ($0.09 per serving)
$19.49($0.08 per serving)
iHerb
$ 19.49
Vitacost
$ 21.45
Report prices

Analysis

A single-ingredient powder makes the vitamin C contribution clear and permits a customized amount. It provides focused antioxidant, collagen, and normal immune support without a proprietary blend.

The recommended 2,000 mg serving reaches the usual adult daily upper limit and may not be the most efficient way to use vitamin C. Dividing a smaller total across the day can improve tolerance.

The larger container is well suited to regular powder users. Anyone with a sensitive stomach may prefer a buffered ascorbate or take a lower amount with food.

Who is it for
  • Regular users of vitamin C powder
  • Adults wanting adjustable servings
  • People comfortable with unbuffered ascorbic acid
Best for
  • Flexible supplementation
  • Single-ingredient vitamin C
  • Antioxidant and collagen support

Pros

  • Pure single active
  • Powder supports divided servings
  • Large supply

Cons

  • Full serving reaches the adult upper limit
  • Acidic form may irritate the stomach
  • Powder needs measuring

Warnings

  • The 2,000 mg amount may cause loose stools or abdominal cramps.
  • People prone to calcium oxalate kidney stones should avoid unnecessary high vitamin C intake.

Nutrient quality

74 High impact

L-ascorbic acid is an established absorbable form, though it is unbuffered and acidic. The amount is substantial but larger than needed for efficient absorption in one serving.

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Ingredient transparency

87 Highest impact

The single active ingredient has a specific listed amount. No other active ingredients are listed, though a complete excipient statement was not supplied.

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Customer satisfaction

73 High impact

The available aggregate rating is strong for this category. No firsthand outcome details were supplied, so alignment with the intended use is uncertain.

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Value for money

95 Highest impact

The simple, pure formula provides good quality for the serving cost. The product is highly competitive among basic bulk vitamin C powders.

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Goals

Anti-Inflammatory Support
Anti-Inflammatory Support
Impact
High effect
B Goal FitC+ Strength of SupportC- CoverageA+ Formula Quality
Vitamin C · 2000 mg

Vitamin C provides strong antioxidant support during inflammatory stress. The single active does not directly regulate several major inflammatory enzymes or resolution pathways.

The very large serving is clearly disclosed but exceeds the most efficient single-dose range. Plain ascorbic acid at this amount may cause stomach discomfort or loose stools, and dividing the serving may improve tolerance.

Study evidence
Vitamin C Supportive 50 studies
General Health
General Health
Impact
High effect
A- Goal FitC+ Strength of SupportD CoverageA Formula Quality
Vitamin C · 2000 mg

Pure L-ascorbic acid supplies a clearly stated vitamin C amount for antioxidant, immune, and collagen-related functions. The simple powder provides focused support without disclosed active padding.

The 2000 mg serving exceeds the preferred efficient range and may cause loose stools or stomach discomfort, especially when taken at once. Smaller divided servings may be easier to tolerate, though the acidic form remains unbuffered.

Study evidence
Vitamin C Supportive 56 studies
Immunity
Immunity
Impact
High effect
B Goal FitC+ Strength of SupportD- CoverageA+ Formula Quality
Vitamin C · 2000 mg

Pure ascorbic acid provides concentrated vitamin C for collagen formation, antioxidant defense, and normal immune function. The single ingredient is fully disclosed and supported by established nutritional science.

The serving reaches the adult upper intake level and exceeds what most people need for daily foundational support. It can cause stomach upset or diarrhea, and sustained high intake may be unsuitable for people prone to oxalate kidney stones.

Study evidence
Vitamin C Supportive 53 studies
Vision Support
Vision Support
Impact
High effect
C+ Goal FitB+ Strength of SupportD CoverageB Formula Quality
Vitamin C · 2000 mg

2,000 mg of vitamin C provides substantial antioxidant support for the lens and other ocular tissues. An isolated vitamin C formula lacks the carotenoids, zinc, copper, and omega-3 fats used in more complete eye-support strategies.

L-ascorbic acid is clearly identified and the single-active powder remains focused. The high vitamin C amount may cause diarrhea or raise kidney-stone risk in susceptible users.

Study evidence
Vitamin C Disputed 24 studies
Skin Health
Skin Health
Impact
High effect
C+ Goal FitB+ Strength of SupportD CoverageB Formula Quality
Vitamin C · 2000 mg

2,000 mg of L-ascorbic acid supplies an established collagen cofactor and antioxidant in a very simple formula. It does not provide collagen, ceramides, or another direct hydration or structural active.

The active and amount are fully disclosed, making the formula easy to assess. A two-gram serving can cause digestive discomfort in some people and may add little skin benefit beyond a moderate intake.

Study evidence
Vitamin C Supportive 53 studies

Ingredients

IngredientAmount per serving
Vitamin C (L-Ascorbic Acid)
 2000 mg
Gluten Free Adults 18–50 Vegan Dairy Free Vegetarian
Report overview
Vitamin C (L-Ascorbic Acid) · 2000 mg OverallScore64
F Active Ingredient Quality & BioavailabilityB+ Dose, Safety & Label TransparencyA+ Value

The large-format pure powder provides straightforward L-ascorbic acid at excellent cost efficiency. Its two-gram serving exceeds the preferred absorption range and may cause digestive discomfort. Smaller divided servings may be easier to tolerate.

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 2,000 mg of vitamin C as L-Ascorbic Acid, 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. Compared with the original's 2,000 mg of vitamin C as L-Ascorbic Acid, the smaller amount favors moderate daily use but provides less vitamin C per serving.
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. Compared with the original's 2,000 mg of vitamin C as L-Ascorbic Acid, the smaller amount favors moderate daily use but provides less vitamin C per serving.
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 2,000 mg of vitamin C as L-Ascorbic Acid, the smaller amount favors moderate daily use but provides less vitamin C per serving.
84 Budget

Ester-C 500 mg With Citrus Bioflavoinds

American Health
The lower serving cost still provides 1,000 mg of vitamin C as Ester-C Calcium Ascorbate with 110 mg of Calcium and 400 mg of Citrus Bioflavonoids Complex. Compared with the original's 2,000 mg of vitamin C as L-Ascorbic Acid, the smaller amount favors moderate daily use but provides less vitamin C per serving.
88 Budget

Sodium Ascorbate

NutriBiotic Immunity
The lower serving cost still provides 1,100 mg of vitamin C as Sodium Ascorbate with a focused single-nutrient formula. Compared with the original's 2,000 mg of vitamin C as L-Ascorbic Acid, 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 2,000 mg of vitamin C as L-Ascorbic Acid, the smaller amount favors moderate daily use but provides less vitamin C per serving.
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. Compared with the original's 2,000 mg of vitamin C as L-Ascorbic Acid, the smaller amount favors moderate daily use but provides less vitamin C per serving.
87 Value

C 500 mg

Mason Natural
The favorable serving cost pairs 500 mg of vitamin C as Ascorbic Acid with a focused single-nutrient formula. Compared with the original's 2,000 mg of vitamin C as L-Ascorbic Acid, the smaller amount favors moderate daily use but provides less vitamin C per serving.
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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