21st Century Vitamin B Complex with Vitamin C 100 Cplts supplement bottle
21st Century

Vitamin B Complex with Vitamin C 100 Cplts

What We Researched
7 active ingredients analyzed · 2 brand certifications checked · 1 retailer compared · Last updated: Mar 2026
91
Product Score Excellent
76
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin C 300 mg 333%
Thiamine 15 mg 1250%
Riboflavin 14.3 mg 1100%
Niacin 50 mg 313%
Vitamin B6 5 mg 294%
Pantothenic Acid 10 mg 200%
Calcium 175 mg 13%
Bioavailability Very Good

Absorption Rating

  • Vitamin C Fair
  • Thiamine Good
  • Riboflavin Good
  • Niacin Good
  • Vitamin B6 Fair
  • Pantothenic Acid Good
  • Calcium Good
Other Ingredients Excellent

Fillers & Additives

No inactive ingredient data available.

Efficacy Very Good

Dosage Analysis

  • Vitamin C 300 mg Effective
  • Thiamine 15 mg Effective
  • Riboflavin 14.3 mg Effective
  • Niacin 50 mg High
  • Vitamin B6 5 mg Effective
  • Pantothenic Acid 10 mg Effective
  • Calcium 175 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin C 300 mg 333%
Thiamine 15 mg 1250%
Riboflavin 14.3 mg 1100%
Niacin 50 mg 313%
Vitamin B6 5 mg 294%
Pantothenic Acid 10 mg 200%
Calcium 175 mg 13%

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
21st Century

Founded 1991 · Tempe, Arizona, United States · 231 products · 21stcenturyvitamins.com/

Certifications

2 certifications
Consumerlab Verified
Nsf Gmp Verified Source

Transparency

4 claims
Third Party Testing Claim — Claimed Source
Testing Lab Disclosure — Verified Source
In House Testing — Verified Source

Violation History

4 incidents
Prop 65 Lead2021-06-22Source
Recall Vitamin D3 5000 IU Tablets2021-05-19Source
Lawsuit False advertising of Glucosamine/Chondroitin supplements.2012Source
Prop 65 Lead2008-12-23Source
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Frequently Asked Questions
Is 21st Century Vitamin B Complex with Vitamin C 100 Cplts a good supplement?

21st Century Vitamin B Complex with Vitamin C 100 Cplts received a product quality score of 91/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 7 active ingredients with 100 servings per container. The manufacturer, 21st Century, holds a brand trust score of 76/100 with 2 verified certifications including Consumerlab, Nsf Gmp.

What are the ingredients in 21st Century Vitamin B Complex with Vitamin C 100 Cplts?

21st Century Vitamin B Complex with Vitamin C 100 Cplts contains 7 active ingredients: Vitamin C (300 mg), Thiamine (15 mg), Riboflavin (14.3 mg), Niacin (50 mg), Vitamin B6 (5 mg), Pantothenic Acid (10 mg), and 1 more. Notable high-dose ingredients include Vitamin C at 333% DV, Thiamine at 1250% DV, Riboflavin at 1100% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is 21st Century Vitamin B Complex with Vitamin C 100 Cplts safe to take?

21st Century Vitamin B Complex with Vitamin C 100 Cplts 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 21st Century a trustworthy supplement brand?

21st Century receives a brand trust score of 76/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1991 and headquartered in Tempe, Arizona, United States, the company offers 231 products in their lineup. They hold 2 verified certifications including Consumerlab, Nsf Gmp. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: 21st Century has 4 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.