🟢 96/100

This product looks safe

  • Vitamin D3: 0.125mg is 1.2× the Tolerable Upper Intake Level (0.1mg)
  • 56% of ingredients have research evidence
C Label Compliance Grade

Product Label

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Safety Alerts

⚠️ Vitamin D3: 0.125mg is 1.2× the Tolerable Upper Intake Level (0.1mg)

Label Data

1 Packet(s) Serving Size
30 Servings
Other Combinations Product Type
56% Evidence Coverage

Supplement Facts — Evidence Check

Calories
5 Calorie(s)
Total Carbohydrates
Vitamin C
500 mg (556% DV)
125 mcg (625% DV)
⚠️ Exceeds Tolerable Upper Intake Level by 1.2× (UL: 0.1 mg) 📚 604 studies (Tier A: 16, B: 251)
RDA 0.015mg This product: 0.125mg UL 0.1mg
62.5 mcg (313% DV)
📊 4.2× RDA — above typical dose (UL: 0.1 mg) 📚 604 studies (Tier A: 16, B: 251)
RDA 0.015mg This product: 0.0625mg UL 0.1mg
5 mg (45% DV)
✅ Within RDA (0.5× RDA of 11 mg) 📚 258 studies (Tier A: 6, B: 134)
RDA 11mg This product: 5mg UL 40mg
Sodium
250 mg (11% DV)
📊 Market median: 500.0mg (283 products) 📚 173 studies (Tier A: 0, B: 62)
This product: 250mg
📊 Market median: 500.0mg (283 products) 📚 173 studies (Tier A: 0, B: 62)
This product: 30mg

Other Ingredients

Citric Acid Sodium Bicarbonate Potassium Bicarbonate Malic Acid Orange Flavor, Natural Steviol Glycosides Sunflower Lecithin Maltodextrin Starch, Modified Silicon Dioxide Sucrose

Label Claims — Verification

Nutrient
All Other
Structure/Function
All Other (99% of products) Structure/Function (83% of products) Nutrient (54% of products)

Target Groups

Adult (18 - 50 Years) Gluten Free Sugar Free

Product Information

📋 Directions for Use

Easily mix Vitamin C-Pak with Quercetin into 8 fl. oz. of water to help meet your daily immune support needs.

Suggested Use: Adults, as a dietary supplement, mix one (1) packet in 8 fl. oz. of water. Product can be taken up to two times per day.

⚠️ Warnings & Precautions

Keep out of reach of children.

Do not use if packet is torn or damaged.

If you are nursing, pregnant, taking medication, including cholesterol lowering medication, or have a medical condition including high cholesterol, consult your physician before taking this product.

🧪 Formulation Notes

Combining the antioxidant power of four key nutrients, Dr. Mercola Vitamin C-Pak with Quercetin delivers exceptional, all-day immune support in convenient packets for the ideal serving every time - even on the go. Dissolves quickly for fast-acting absorption, this effervescent powder: Contains a gentler vitamin C formed with lipid metabolites to help enhance delivery and overall immune function. Offers high-quality quercetin to provide optimal support for seasonal metabolic health. Includes the form of vitamin D that your body makes from sunlight, also known as cholecalciferol. Provides the benefits of zinc without the metallic taste.

Is produced without gluten.

Immune Support Antioxidant Seasonal Support

Daily Immune Support

Plus antioxidant Quercetin 500 mg Vitamin C plus Quercetin & Vitamin D3 Natural Orange Flavor with other natural flavors Fizzy drink mix

Zero grams of sugar per serving

Product Details

DSLD Entry Date 2024-05-23
Product Type Other Combinations
Form Powder
Brand Dr. Mercola
DSLD ID 308871
Data Updated 2026-04-11

Research Evidence

371 Research Sources
54 Avg Quality Score
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
A Vitamin C supplementation for the primary prevention of cardiovascular disease
Systematic Review The Cochrane database of systematic reviews 2017
A Vitamin C for preventing and treating the common cold
Meta Analysis The Cochrane database of systematic reviews 2013
A Vitamin C for preventing and treating pneumonia
Meta Analysis The Cochrane database of systematic reviews 2013
A Vitamin E supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015
A Vitamin C supplementation for prevention and treatment of pneumonia
Meta Analysis The Cochrane database of systematic reviews 2020
A Vitamin C supplementation for prevention and treatment of pneumonia
Systematic Review The Cochrane database of systematic reviews 2021
A Nutritional interventions for preventing and treating pressure ulcers
Meta Analysis The Cochrane database of systematic reviews 2024
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
A Circulating vitamin C concentration and risk of cancers: a Mendelian randomization study
Meta Analysis BMC medicine 2021
View all evidence for Vitamin C →

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