Dr. Mercola Vitamin C-PAK with Quercetin, Natural Orange, 30 Packets, 0.18 oz (5.12 g) Each supplement bottle
Dr. Mercola

Vitamin C-PAK with Quercetin, Natural Orange, 30 Packets, 0.18 oz (5.12 g) Each

What We Researched
9 active ingredients analyzed · 11 inactive ingredients decoded · 4 brand certifications checked · 2 retailers compared · Last updated: Mar 2026
80
Product Score Good
81
Brand Score Good

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin C (as Ascorbic Acid) 500 mg 556%
Vitamin D3 (as Cholecalciferol) (2,500 IU) 62.5 mcg 313%
Zinc (as Zinc Bisglycinate Chelate) 5 mg 45%
Quercetin Phytosome Complex^^ (from Sophora japonica Flower) 250 mg **
Bioflavonoid Lipid Metabolite Complex [Citrus Bioflavonoids (from Orange Extract), Fatty Acids (from Rice Bran)] 30 mg **
Bioavailability Very Good

Absorption Rating

  • Vitamin C (as Ascorbic Acid) Fair
  • Vitamin D3 (as Cholecalciferol) (2,500 IU) Good
  • Zinc (as Zinc Bisglycinate Chelate) Good
  • Quercetin Phytosome Complex^^ (from Sophora japonica Flower) Good
  • Bioflavonoid Lipid Metabolite Complex [Citrus Bioflavonoids (from Orange Extract), Fatty Acids (from Rice Bran)] Fair
Other Ingredients Excellent

Fillers & Additives

  • Citric Acid
  • Sodium Bicarbonate
  • Potassium Bicarbonate
  • Malic Acid
  • Natural Orange Flavor with Other Natural Flavors
  • Organic steviol glycosides (from stevia rebaudiana leaf)
  • Sunflower Lecithin
  • Maltodextrin
  • Modified Starch
  • Silicon Dioxide
  • Sucrose
Efficacy Fair

Dosage Analysis

  • Vitamin C (as Ascorbic Acid) 500 mg Effective
  • Vitamin D3 (as Cholecalciferol) (2,500 IU) 62.5 mcg Effective
  • Zinc (as Zinc Bisglycinate Chelate) 5 mg Under-dosed
  • Quercetin Phytosome Complex^^ (from Sophora japonica Flower) 250 mg Under-dosed
  • Bioflavonoid Lipid Metabolite Complex [Citrus Bioflavonoids (from Orange Extract), Fatty Acids (from Rice Bran)] 30 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Calories 5
Total Carbohydrate 0 g 0%*
Total Sugars 0 g
Vitamin C (as Ascorbic Acid) 500 mg 556%
Vitamin D3 (as Cholecalciferol) (2,500 IU) 62.5 mcg 313%
Zinc (as Zinc Bisglycinate Chelate) 5 mg 45%
Sodium 250 mg 11%
Quercetin Phytosome Complex^^ (from Sophora japonica Flower) 250 mg **
Bioflavonoid Lipid Metabolite Complex [Citrus Bioflavonoids (from Orange Extract), Fatty Acids (from Rice Bran)] 30 mg **

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Citric Acid Safe

Adds tartness and acts as a natural preservative. Also aids in ingredient stability.

Sodium Bicarbonate Safe

It is used as a buffer to neutralize acids.

Potassium Bicarbonate Safe

It is used as a buffering agent to adjust pH levels.

Malic Acid Safe

Adds tartness and enhances fruit flavors in gummies and chewables.

Natural Orange Flavor with Other Natural Flavors Generally_safe

It is used to provide a natural orange flavor to the supplement.

Organic steviol glycosides (from stevia rebaudiana leaf) Unknown
Sunflower Lecithin Safe

Helps mix oil and water-based ingredients. Allergen-free alternative to soy lecithin.

Maltodextrin Generally_safe

Helps carry and stabilize active ingredients. Provides bulk.

Modified Starch Generally_safe

It is used as a filler, binder, or thickener.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Sucrose Generally_safe

It is used as a sweetener.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$46$45$44$43$42 Mar 12 $43.99
iHerb

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
Dr. Mercola

Founded 1997 · Cape Coral, Florida, USA · 209 products · mercola.com/

Certifications

4 certifications
Consumerlab Verified Source
Nsf Gmp Verified Source
Usda Organic Verified Source
Fda Gmp Inspections Verified Source

Transparency

2 claims
Third Party Testing Claim — Verified Source

Violation History

7 incidents
Prop 65 Lead2025-04-18Source
Lawsuit Wrongful termination and breach of a severance contract by the former CEO.2024Source
Fda Warning Unapproved and misbranded products related to Coronavirus Disease 2019 (COVID-19).2021-02-18Source
Lawsuit False and unsupported claims that its indoor tanning systems are safe and do not increase the risk of skin cancer.2016Source
Fda Warning Illegal marketing of a medical device.2011-01-01Source
Fda Warning Illegal drug claims for various supplements.2006-01-01Source
Fda Warning Illegal drug claims for various supplements.2005-01-01Source
Related Supplements
Frequently Asked Questions
Is Dr. Mercola Vitamin C-PAK with Quercetin, Natural Orange a good supplement?

Dr. Mercola Vitamin C-PAK with Quercetin, Natural Orange, 30 Packets, 0.18 oz (5.12 g) Each received a product quality score of 80/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 9 active ingredients with 30 servings per container. Of the 11 inactive ingredients, 6 are rated safe and 0 are flagged for review. The manufacturer, Dr. Mercola, holds a brand trust score of 81/100 with 4 verified certifications including Consumerlab, Nsf Gmp, Usda Organic, Fda Gmp Inspections.

What are the ingredients in Dr. Mercola Vitamin C-PAK with Quercetin, Natural Orange?

Dr. Mercola Vitamin C-PAK with Quercetin, Natural Orange contains 9 active ingredients: Calories (5), Total Carbohydrate (0 g), Total Sugars (0 g), Vitamin C (as Ascorbic Acid) (500 mg), Vitamin D3 (as Cholecalciferol) (2,500 IU) (62.5 mcg), Zinc (as Zinc Bisglycinate Chelate) (5 mg), and 3 more. Notable high-dose ingredients include Vitamin C at 556% DV, Vitamin D3 at 313% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Dr. Mercola Vitamin C-PAK with Quercetin, Natural Orange safe to take?

Dr. Mercola Vitamin C-PAK with Quercetin, Natural Orange, 30 Packets, 0.18 oz (5.12 g) Each has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Dr. Mercola a trustworthy supplement brand?

Dr. Mercola receives a brand trust score of 81/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1997 and headquartered in Cape Coral, Florida, USA, the company offers 209 products in their lineup. They hold 4 verified certifications including Consumerlab, Nsf Gmp, Usda Organic, Fda Gmp Inspections. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Dr. Mercola has 7 historical regulatory incidents on record, which are factored into the trust score.

How much vitamin d3 should i take daily?

The optimal dosage depends on your individual health needs, age, sex, and current nutrient levels. Recommended daily amounts are established by health authorities but may vary from therapeutic doses used in clinical research. It's important to check the Supplement Facts label for the exact amount per serving and compare it against the % Daily Value. Some supplements provide mega-doses well above the Daily Value, which may not be necessary and in some cases could be harmful — particularly for fat-soluble vitamins (A, D, E, K) that accumulate in the body. GoodSupp's efficacy analysis evaluates whether a product's dosages align with clinically studied amounts. Always consult your healthcare provider for personalized dosage recommendations.

What does vitamin d do?

This is an important question for supplement consumers. The dietary supplement industry is largely self-regulated, which means product quality, ingredient transparency, and safety practices vary significantly between brands and products. The most reliable way to evaluate any supplement is to check for third-party testing certifications, review the full ingredient list and dosages, and research the brand's regulatory track record. GoodSupp's database of over 250,000 analyzed products provides independent quality scores, ingredient safety ratings, and brand trust reports to help you make evidence-based decisions.

How much vitamin d3 per day for a woman?

The optimal dosage depends on your individual health needs, age, sex, and current nutrient levels. Recommended daily amounts are established by health authorities but may vary from therapeutic doses used in clinical research. It's important to check the Supplement Facts label for the exact amount per serving and compare it against the % Daily Value. Some supplements provide mega-doses well above the Daily Value, which may not be necessary and in some cases could be harmful — particularly for fat-soluble vitamins (A, D, E, K) that accumulate in the body. GoodSupp's efficacy analysis evaluates whether a product's dosages align with clinically studied amounts. Always consult your healthcare provider for personalized dosage recommendations.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.