Product Image

Gold C Vitamin C 1000 mg

California Gold Nutrition
4.8
★ ★ ★ ★ ★
(385775 ratings)
Vitamin C 1000 mg
Product Image
Score85
A convenient, clearly dosed 1,000 mg vitamin C capsule with a simple formula. The fixed high amount and acidic form are the main trade-offs.
How scoring works
Quantity:60 Capsule(s) • (60 servings)
Goals:
Anti-Inflammatory Support
General Health
Immunity
Skin Health
Vision Support

Score 85

A convenient, clearly dosed 1,000 mg vitamin C capsule with a simple formula. The fixed high amount and acidic form are the main trade-offs.
How scoring works

Also available as

1 option
240 servings C 1000 mg • 240 Capsule(s) • 240 servings $14.84 ($0.06 per serving)
$4.38($0.07 per serving)
iHerb
$ 4.38
Report prices

Analysis

A full gram of ascorbic acid provides focused support for normal antioxidant, collagen, and immune functions. One capsule makes the serving convenient and removes the need to measure powder.

The formula is easy to interpret because no companion actives obscure its purpose. Plain ascorbic acid does not offer the stomach-comfort benefits of mineral ascorbates.

The amount is substantial but may exceed what some users want in one sitting. People preferring a moderate intake or flexible dosing may be better served by a lower-strength capsule.

Who is it for
  • Adults wanting one-capsule high-dose vitamin C
  • Users who value a simple formula
  • People who tolerate ascorbic acid
Best for
  • Convenient daily vitamin C
  • Antioxidant and collagen support
  • Focused single-nutrient use

Pros

  • Full gram in one capsule
  • Clear single-active formula
  • Convenient fixed serving

Cons

  • Unbuffered ascorbic acid
  • Serving cannot be easily divided
  • No complementary nutrients

Warnings

  • The 1,000 mg amount may cause stomach irritation or loose stools in sensitive users.

Nutrient quality

89 Highest impact

Ascorbic acid is established and absorbable but remains unbuffered and acidic. The vitamin C amount is substantial and well targeted for high-potency use.

.

Ingredient transparency

86 Highest impact

The single active ingredient has a specific amount. A complete inactive ingredient list was not supplied.

.

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.

.

Value for money

93 Highest impact

The simple formula provides good quality for a basic vitamin C capsule. The product compares favorably with other plain high-potency vitamin C capsules.

.
Report analysis

Goals

Anti-Inflammatory Support
Anti-Inflammatory Support
Impact
Highest effect
B Goal FitA- Strength of SupportC CoverageA+ Formula Quality
Vitamin C · 1000 mg

Vitamin C provides substantial antioxidant support and helps regenerate other antioxidants during inflammatory stress. Its role is useful but narrower than fish oil, vitamin D, or botanicals that directly regulate inflammatory enzymes.

The amount reaches the preferred range and is clearly disclosed in a simple capsule. Plain ascorbic acid offers no buffering or enhanced delivery, while the focused design avoids underdosed label padding.

Study evidence
Vitamin C Supportive 50 studies
General Health
General Health
Impact
Highest effect
A- Goal FitB+ Strength of SupportD+ CoverageA Formula Quality
Vitamin C · 1000 mg

A 1000 mg capsule provides a strong, clearly disclosed vitamin C contribution for antioxidant, immune, and collagen support. The single-ingredient approach offers useful depth for correcting a vitamin C gap.

Generic ascorbic acid has no buffering or enhanced delivery feature, so it may be less comfortable for sensitive stomachs. The narrow formula does not cover the wider range of nutrients involved in general wellness.

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

Ascorbic acid supplies a substantial amount of an essential antioxidant needed for collagen formation and normal immune function. The single active ingredient is clearly disclosed and supported by established nutritional evidence.

Coverage is narrow because vitamin C alone does not address most daily nutrient needs. The large serving 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
Skin Health
Skin Health
Impact
High effect
C+ Goal FitA- Strength of SupportD+ CoverageB Formula Quality
Vitamin C · 1000 mg

1,000 mg of ascorbic acid supplies an established cofactor for collagen formation and antioxidant protection. The amount is substantial, but oral vitamin C alone is not a complete skin formula.

The ingredient and amount are clearly disclosed in a simple formula. Support is limited to collagen-related and antioxidant needs, with no direct hydration or structural building block.

Study evidence
Vitamin C Supportive 53 studies
Vision Support
Vision Support
Impact
High effect
C+ Goal FitA- Strength of SupportD CoverageB Formula Quality
Vitamin C · 1000 mg

1,000 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.

Ascorbic acid is clearly identified and the single-active tablet remains focused. The narrow formula is best viewed as foundational antioxidant support rather than comprehensive vision care.

Study evidence
Vitamin C Disputed 24 studies

Ingredients

IngredientAmount per serving
Vitamin C (Ascorbic Acid)
 1000 mg
Gluten Free Adults 18–50 Dairy Free Vegetarian
Report overview
Vitamin C (Ascorbic Acid) · 1000 mg OverallScore72
F Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value

The vitamin C amount fits the preferred range, but generic ascorbic acid provides no buffering or enhanced delivery. The supplied formula is simple and clearly quantified. Its low cost per gram makes it efficient for readers who tolerate acidic vitamin C well.

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 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. The amount matches the original, while Sodium Ascorbate replaces Ascorbic Acid 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 Ascorbic Acid 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 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. The amount matches the original, while Ester-C Calcium Ascorbate replaces Ascorbic Acid and gives users a different disclosed form.
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 1,000 mg of vitamin C as Ascorbic Acid, the larger disclosed amount may better fit users seeking higher-potency vitamin C.
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 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. The vitamin C amount is similar to the original, while the added ingredients and label details determine the more useful fit.
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 1,000 mg of vitamin C as Ascorbic Acid, the smaller amount favors moderate daily use but provides less vitamin C per serving.
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 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
  3. Vitamin C for the management of COVID-19: a systematic review and meta-analysis of randomized controlled trials.
    Abid H; Mushtaq I; Munir ABI; Shakil J; Vinjamuri S; Tadasare N; Kiran F; Muhammad Wali Mirza A; Fatima Khidri F; Shahid A; Ayyan M; Ehsan M; Cheema HA; Alsubari AMA; Sahra S; Siddiqi NI · Annals of medicine and surgery (2012) · 2026
    Meta-analysis9 studies pooledImmunity forVitamin C
  4. Association between hemoglobin A1c, Vitamin C, and microbiome in diabetic foot ulcers and intact skin: A cross-sectional study.
    Tong KPS; Green SJ; Ortiz J; Wu SC · Health science reports · 2024
    Cross-sectional study42 participantsSkin Health forVitamin C
  5. Immunocompetence and oxidant defense during ascorbate depletion of healthy men.
    Jacob RA; Kelley DS; Pianalto FS; Swendseid ME; Henning SM; Zhang JZ; Ames BN; Fraga CG; Peters JH · The American journal of clinical nutrition · 1992
    Clinical trial8 participantsImmunity forVitamin C
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. Intake of vitamin C, vitamin E, selenium, zinc and polyunsaturated fatty acids and upper respiratory tract infection-a prospective cohort study.
    Raposo SE; Fondell E; Ström P; Bälter O; Bonn SE; Nyrén O; Plymoth A; Bälter K · European journal of clinical nutrition · 2018
    Cohort study1,533 participantsImmunity forVitamin C
  12. Comparison of the Efficacy of Intralesional Ascorbic Acid Mesotherapy and Intralesional Tranexamic Acid in Treating Melasma in the Skin of Colour Population.
    Aslam H; Muhammad A; Ullah A; Aziz N; Lakhiar JA; Ahmad B; Shahzadi A; Ahmad A; Chandni; Virdi G · Cureus · 2025
    Randomized trial110 participantsSkin Health forVitamin C
  13. Efficacy and Safety of tranexamic acid versus vitamin c after microneedling in treatment of melasma: Clinical and Dermoscopic study.
    El Attar Y; Doghaim N; El Far N; El Hedody S; Hawwam SA · Journal of cosmetic dermatology · 2022
    Randomized trial20 participantsSkin Health forVitamin C
  14. Dietary intake and supplement use of vitamins C and E and upper respiratory tract infection.
    Fondell E; Bälter O; Rothman KJ; Bälter K · Journal of the American College of Nutrition · 2012
    Cohort study1,509 participantsImmunity forVitamin C
  15. Comparative Evaluation of Locally Injected Dexamethasone with and Without Vitamin C in Mandibular Fractures: A Randomized Controlled Trial.
    Chincholkar A; Rudagi BM; Setiya S; Sakhariya S · Journal of maxillofacial and oral surgery · 2025
    Randomized trial30 participantsSkin Health forVitamin C
  16. Vitamin C supplementation and salivary immune function following exercise-heat stress.
    Carrillo AE; Murphy RJ; Cheung SS · International journal of sports physiology and performance · 2009
    Randomized trial12 participantsImmunity forVitamin C
  17. 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
  18. 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
  19. Split-Face Comparative Analysis Of Micro-Needling With Tranexamic Acid Vs Vitamin C Serum In Melasma.
    Raza MH; Iftikhar N; Anwar A; Mashhood AA; Tariq S; Bin Hamid MA · Journal of Ayub Medical College, Abbottabad : JAMC · 2022
    Non-randomized trial30 participantsSkin Health forVitamin C
  20. 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
  21. 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
  22. 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
  23. 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
  24. 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
  25. 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
  26. 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
  27. 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
  28. 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
  29. 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
  30. 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
  31. 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
  32. 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
  33. 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
  34. 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
  35. 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
  36. 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
  37. Nutritional modulation of cataract.
    Weikel KA; Garber C; Baburins A; Taylor A · Nutrition reviews · 2014
    Narrative reviewVision Support forVitamin C
  38. 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
  39. 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