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21st Century

Founded 1991 · Tempe, Arizona, United States · 383 products · 21stcenturyvitamins.com/

What We Researched

GoodSupp reviewed 9 sources for 21st Century. The evidence below covers testing publisher listings, company statements or public records found during that review.

394 products in the catalog · Last checked:

We checked company information, testing publishers, certification directories and public regulatory records.

Public evidence for 21st Century
SourceFindings
ConsumerLabConsumerLab's public Tested Brands table lists 21st Century with 1 tested product. Approval and Top Pick outcomes are masked behind membership and were not inferred.
Labdoor21st Century Quick Dissolve Melatonin — A. Search results can be fuzzy; only exact brand-title matches were accepted.
NSF certified products/facilities21st Century HealthCare, Inc. — B-12, D3, and One Daily products. Certification scope is limited to the listed entity and products.

Company statements are identified as claims. Publisher listings and regulatory records apply to the products, facilities and dates described. A missing public listing does not establish that testing never occurred.

85
Brand Score

Certifications

3 certifications
Nsf Gmp Source available Primary evidence
NSF Contents Certified Supporting evidence unavailable
NSF Certified Supporting evidence unavailable

Transparency Claims

5 claims
Third Party Testing Claim — Evidence available Evidence
Testing Lab Disclosure — Evidence available Evidence
In House Testing — Evidence available Evidence
Contains Proprietary Blend — Brand claim; evidence unavailable

Violation History

4 incidents
Prop 65 Lead2021-06-22 Source available Primary source
Recall Vitamin D3 5000 IU Tablets2021-05-19 Source available Primary source
Lawsuit False advertising of Glucosamine/Chondroitin supplements.2012 Source available Primary source
Prop 65 Lead2008-12-23 Source available Primary source
Products by 21st Century
Co Q10 200 mg
Co Q10 200 mg
Product 100 Brand 85
Maximum Strength Co Q10 200 mg
Maximum Strength Co Q10 200 mg
Product 100 Brand 85
Standardized Olive Leaf Extract
Standardized Olive Leaf Extract
Product 100 Brand 85
Valerian Extract
Valerian Extract
Product 100 Brand 85
Super Strength D3-2000 IU
Super Strength D3-2000 IU
Product 100 Brand 85
Co Q10 100 mg
Co Q10 100 mg
Product 100 Brand 85
Beet Root 500 mg
Beet Root 500 mg
Product 100 Brand 85
Flaxseed Oil, 1,000 mg
Flaxseed Oil, 1,000 mg
Product 100 Brand 85
Standardized Ashwagandha Extract 500 mg
Standardized Ashwagandha Extract 500 mg
Product 100 Brand 85
Horse Chestnut Extract 300 mg
Horse Chestnut Extract 300 mg
Product 100 Brand 85
Vitamin D3 25 mcg (1000 IU) Softgels
Vitamin D3 25 mcg (1000 IU) Softgels
Product 100 Brand 85
Vitamin D3, 50 mcg (2000 IU)
Vitamin D3, 50 mcg (2000 IU)
Product 100 Brand 85
CoQ10, 100 mg
CoQ10, 100 mg
Product 100 Brand 85
CoQ10, 200 mg
CoQ10, 200 mg
Product 100 Brand 85
CoQ-10 200 mg Rapid Release Softgels
CoQ-10 200 mg Rapid Release Softgels
Product 100 Brand 85
CoQ-10 100 mg Rapid Release Softgels
CoQ-10 100 mg Rapid Release Softgels
Product 100 Brand 85
K2 MK-7 100 mcg
K2 MK-7 100 mcg
Product 100 Brand 85
Selenium, 200 mcg
Selenium, 200 mcg
Product 100 Brand 85
Vitamin A, 3,000 mcg (10000 IU)
Vitamin A, 3,000 mcg (10000 IU)
Product 100 Brand 85
Berberine HCI 500 mg Vegetarian Capsules
Berberine HCI 500 mg Vegetarian Capsules
Product 100 Brand 85
Standardized Ginseng Extract 100 mg
Standardized Ginseng Extract 100 mg
Product 100 Brand 85
Chelated Magnesium Glycinate 100 mg
Chelated Magnesium Glycinate 100 mg
Product 100 Brand 85
Chewable C-250
Chewable C-250
Product 98 Brand 85
E 180 mg (400 IU)
E 180 mg (400 IU)
Product 96 Brand 85
Full Fuel 365 Creatine Monohydrate Gummies Mixed Berry
Full Fuel 365 Creatine Monohydrate Gummies Mixed Berry
Product 96 Brand 85
VitaJoy® Daily D3 Gummies, Peach, 120 Gummies (25 mcg (1000 IU) per Gummy)
VitaJoy® Daily D3 Gummies, Peach, 120 Gummies (25 mcg (1000 IU) per Gummy)
Product 95 Brand 85
Black Cohosh
Black Cohosh
Product 93 Brand 85
Blended E-400
Blended E-400
Product 93 Brand 85
Standardized Black Cohosh Soy Isoflavones Vegetarian
Standardized Black Cohosh Soy Isoflavones Vegetarian
Product 93 Brand 85
600+D3
600+D3
Product 93 Brand 85
Standardized Herbal Energy
Standardized Herbal Energy
Product 93 Brand 85
Pomegranate 500 mg
Pomegranate 500 mg
Product 93 Brand 85
Calcium Citrate Calcium + Soy
Calcium Citrate Calcium + Soy
Product 93 Brand 85
Ultra Formula Co Q10 400 mg
Ultra Formula Co Q10 400 mg
Product 93 Brand 85
Natural Vitamin E, 268 mg (400 IU)
Natural Vitamin E, 268 mg (400 IU)
Product 93 Brand 85
Red Yeast Rice 600 mg
Red Yeast Rice 600 mg
Product 93 Brand 85
Vitamin D3 125 mcg (5000 IU) Softgels
Vitamin D3 125 mcg (5000 IU) Softgels
Product 93 Brand 85
Vitamin D3 250 mcg (10000 IU) Softgels
Vitamin D3 250 mcg (10000 IU) Softgels
Product 93 Brand 85
Co Q-10, 400 mg
Co Q-10, 400 mg
Product 93 Brand 85
Cinnamon plus Chromium 120 Vegetarian Capsules
Cinnamon plus Chromium 120 Vegetarian Capsules
Product 93 Brand 85
Lion's Mane, 2,100 mg, 60 Vegetarian Capsules
Lion's Mane, 2,100 mg, 60 Vegetarian Capsules
Product 93 Brand 85
B-50 Complex, Prolonged Release
B-50 Complex, Prolonged Release
Product 86 Brand 85
Gelatin, 600 mg
Gelatin, 600 mg
Product 62 Brand 85
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Frequently Asked Questions
What testing evidence is available for 21st Century?

The September 3, 2026 review found public listings from ConsumerLab, Labdoor, NSF certified products/facilities. The evidence table identifies the products or company listings covered. A publisher listing does not mean every product has passed testing.

What are the best 21st Century supplements?

Based on GoodSupp's quality analysis, the highest-rated 21st Century supplements are: Co Q10 200 mg (score: 100/100); Maximum Strength Co Q10 200 mg (score: 100/100); Standardized Olive Leaf Extract (score: 100/100). These scores are calculated from ingredient quality, dosage adequacy, bioavailability, label transparency, and inactive ingredient safety. Scores can vary significantly across a brand's product line — a high brand trust score doesn't guarantee every individual product is top-quality.

Where is 21st Century located?

21st Century is headquartered in Tempe, Arizona, United States. The company was founded in 1991. They currently offer 383 products in their supplement lineup. Their official website is 21stcenturyvitamins.com. Manufacturing location may differ from corporate headquarters — look for GMP certification to verify manufacturing quality standards.

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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 — read our methodology. 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.