Ester-C

product on market Tablet or Pill Kala Health 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

Ester-C and ascorbic acid provide vitamin C for antioxidant support, while citrus bioflavonoids may enhance its activity. There is strong evidence supporting the role of vitamin C in immune function and collagen synthesis. Calcium provides essential mineral support for bone and nerve health.

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

Label

Product Label

Label for Ester-C
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Tablet(s)
Serving Size
60
Servings
Other Combinations
Product Type
50%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Ester-C
1000 mg
790 mg (990% DV)
8.8× RDA — above typical dose (UL: 2000 mg) 250 studies (A:6, B:97)
Calcium
90 mg (11% DV)
Market median: 500.0mg (283 products) 174 studies (A:0, B:62)

Other Ingredients

Vitamin C Microcrystalline Cellulose Rice Extract Rice Concentrate Hydroxypropyl Methylcellulose Stearic Acid Glycerin Carnauba Wax
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Info

Product Information

Directions for Use

Recommended dosage: Adults take one tablet per day, or as recommended. For children adapt dosage according to body weight. Best taken with meals. Do not exceed the recommended dosage. Do not take if product has expired.

Warnings & Precautions

Do not exceed the recommended dosage. Do not take if product has expired.

Storage: Store in a cool, dark, dry place, out of reach of children.

A food supplement should not be used as a substitute for a varied diet.

Formulation Notes

Ester-C is a patented form of pH-neutral vitamin C (Calcium ascorbate) and natural metabolites.

Food Supplement, containing vitamin C and bioflavonoids.

Ester-C with Citrus Bioflavonoids

Free of: Sugar, yeast, starch, gluten, artificial flavors, colors or preservatives.

Additional Information

%RI = Reference Intake

Storage: Store in a cool, dark, dry place, out of reach of children.

Metadata

Product Details

UPC / SKU8 719322 754523
DSLD Entry Date2024-07-25
Product TypeOther Combinations
FormTablet or Pill
DSLD ID311297
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.