Dr. Clark Store Vitamin C Powder 100% Pure Ascorbic Acid supplement bottle
Dr. Clark Store

Vitamin C Powder 100% Pure Ascorbic Acid

What We Researched
1 active ingredient analyzed · 1 inactive ingredient decoded · 2 retailers compared · Last updated: Mar 2026
87
Product Score Good
57
Brand Score Poor

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin C (as Ascorbic Acid) 650 mg 1083%
Bioavailability Fair

Absorption Rating

  • Vitamin C (as Ascorbic Acid) Fair
Other Ingredients Excellent

Fillers & Additives

  • None
Efficacy Excellent

Dosage Analysis

  • Vitamin C (as Ascorbic Acid) 650 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Vitamin C (as Ascorbic Acid) 650 mg 1083%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

None Unknown

Price Comparison

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. Clark Store

Founded 1993 · Chula Vista, CA, USA · 109 products · drclarkstore.com/

Transparency

3 claims
Testing Lab Disclosure — Verified Source
In House Testing — Verified Source

Violation History

1 incident
Prop 65 Prop 65 Violation2011-04-15Source
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Frequently Asked Questions
Is Dr. Clark Store Vitamin C Powder 100% Pure Ascorbic Acid a good supplement?

Dr. Clark Store Vitamin C Powder 100% Pure Ascorbic Acid received a product quality score of 87/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 1 active ingredients with 698 servings per container. Of the 1 inactive ingredients, 0 are rated safe and 0 are flagged for review. The manufacturer, Dr. Clark Store, holds a brand trust score of 57/100.

What are the ingredients in Dr. Clark Store Vitamin C Powder 100% Pure Ascorbic Acid?

Dr. Clark Store Vitamin C Powder 100% Pure Ascorbic Acid contains 1 active ingredients: Vitamin C (as Ascorbic Acid) (650 mg). Notable high-dose ingredients include Vitamin C at 1083% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Dr. Clark Store Vitamin C Powder 100% Pure Ascorbic Acid safe to take?

Dr. Clark Store Vitamin C Powder 100% Pure Ascorbic Acid 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. Clark Store a trustworthy supplement brand?

Dr. Clark Store receives a brand trust score of 57/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1993 and headquartered in Chula Vista, CA, USA, the company offers 109 products in their lineup. Note: Dr. Clark Store has 1 historical regulatory incident 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.