21st Century

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

85
Brand Score

Certifications

3 certifications
Nsf Gmp Verified Source
NSF Contents Certified Verified
NSF Certified Verified

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
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
Arthri-Flex Advantage + Vitamin D3
Arthri-Flex Advantage + Vitamin D3
Product 92 Brand 85
Digestive Enzymes
Digestive Enzymes
Product 92 Brand 85
Glucosamine Chondroitin 210 Easy to Swallow Capsules
Glucosamine Chondroitin 210 Easy to Swallow Capsules
Product 91 Brand 85
Glucosamine Chondroitin Capsules
Glucosamine Chondroitin Capsules
Product 91 Brand 85
Glucosamine Chondroitin 500 mg/400 mg Capsules
Glucosamine Chondroitin 500 mg/400 mg Capsules
Product 91 Brand 85
Frequently Asked Questions
Is 21st Century a trustworthy supplement brand?

21st Century receives a brand trust score of 85/100 in GoodSupp's independent analysis. The company was founded in 1991 and is headquartered in Tempe, Arizona, United States. They hold 3 verified certifications including Nsf Gmp, NSF Contents Certified, NSF Certified. These certifications are independently verified by GoodSupp and indicate the brand meets recognized quality, purity, and manufacturing standards. Note: 21st Century has 4 historical regulatory incidents on record. These are factored into the overall trust score and are detailed in the violation history section above.

Is 21st Century third-party tested?

Yes. 21st Century holds 3 verified third-party certifications: Nsf Gmp, NSF Contents Certified, NSF Certified. Third-party testing means an independent laboratory — not the supplement company itself — has verified the product's contents, purity, and/or manufacturing practices. This is one of the strongest indicators of supplement quality because it removes the conflict of interest inherent in self-testing. Not all certifications are equal: NSF International and USP are considered the gold standard, while GMP certification indicates proper manufacturing practices.

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.