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C 1000 mg

product on market Tablet or Pill Kirkland Signature Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 50% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

AI-generated · Qwen 3.6 · methodology

Vitamin C is supported by strong evidence for its role in immune function and antioxidant protection. The citrus bioflavonoid complex is included to potentially enhance absorption, though research on its individual efficacy is more limited. This combination is generally recognized as safe for most adults.

AI-generated summary based on research evidence. Not medical advice.

Label

Product Label

Label for C 1000 mg
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Tablet(s)
Serving Size
500
Servings
Other Combinations
Product Type
50%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Vitamin C
1000 mg (1111% DV)
Market median: 500.0mg (283 products) 174 studies (A:0, B:62)

Other Ingredients

Ascorbic Acid Microcrystalline Cellulose Maltodextrin Croscarmellose Sodium Citrus Bioflavonoid Complex Magnesium Stearate Guar Gum Palm Oil Rose Hips Silicon Dioxide Stearic Acid Sunflower Lecithin
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Suggested Use: Adults - Take one (1) tablet daily with food as a dietary supplement.

Warnings & Precautions

Caution: Pregnant or nursing women, individuals taking medication(s) or persons who have a health condition should consult their physician before using this product.

Keep out of the reach of children.

Vitamin Infoline 1-800-428-8048 Important: Tamper-evident seal under cap. Do not use if printed seal is broken or missing.

Formulation Notes

Quality Purity Potency

Kirkland Signature Vitamin C helps the body's cells fight against oxidative damage.

Vitamin C helps maintain and support: Antioxidant activity Immune system USP has tested and verified ingredients, potency, and manufacturing process. USP sets official standards for dietary supplements. See www.uspverified.org

EZ swallow coating

C 1000 mg with Rose Hips and Citrus Bioflavonoid Complex

May support the immune system May promote antioxidant activity

No artificial colors or flavors No gluten No lactose

Some scientific evidence suggests that consumption of antioxidant vitamins may reduce the risk of certain forms of cancer, However, FDA does not endorse this claim because the evidence is limited and not conclusive.

Vitamin C tablets USP

Tablet color may vary.

Percent Daily Values are based on the new RDI (Reference Daily Intake) published by the FDA in May 2016.

Additional Information

USP Dietary Supplement Verified

Store at 15 degrees - 30 degrees C (59 degrees - 86 degrees F).

Metadata

Product Details

UPC / SKU0 96619 98268 4
DSLD Entry Date2022-12-13
Product TypeOther Combinations
FormTablet or Pill
DSLD ID278462
Data Updated2026-04-11
Research

Research Evidence

371
Research Sources
54
Avg Quality
148
Meta Analysis
82
Systematic Review
71
Rct
62
Clinical Trial
2
Regulatory Source
1
Cochrane Review
1
Narrative Review
1
Other
1
Openfda Safety
A Vitamin C supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015 PubMed DOI
A Vitamin C supplementation for the primary prevention of cardiovascular disease
Systematic Review The Cochrane database of systematic reviews 2017 PubMed DOI
A Vitamin C for preventing and treating the common cold
Meta Analysis The Cochrane database of systematic reviews 2013 PubMed DOI
A Vitamin C for preventing and treating pneumonia
Meta Analysis The Cochrane database of systematic reviews 2013 PubMed DOI
A Vitamin E supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015 PubMed DOI
A Vitamin C supplementation for prevention and treatment of pneumonia
Meta Analysis The Cochrane database of systematic reviews 2020 PubMed DOI
A Vitamin C supplementation for prevention and treatment of pneumonia
Systematic Review The Cochrane database of systematic reviews 2021 PubMed DOI
A Nutritional interventions for preventing and treating pressure ulcers
Meta Analysis The Cochrane database of systematic reviews 2024 PubMed DOI
A Does Vitamin C Supplementation Provide a Protective Effect in Periodontal Health? A Systematic Review and Meta-Analysis
Meta Analysis International journal of molecular sciences 2024 PubMed DOI
A Circulating vitamin C concentration and risk of cancers: a Mendelian randomization study
Meta Analysis BMC medicine 2021 PubMed DOI
View all evidence for Vitamin C →
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.