21st Century

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

Certifications

2 certifications
Consumerlab Verified
Nsf Gmp 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
Products by 21st Century (showing 10 of 243)
Beet Root, 90 Capsules (500 mg per Capsule)
Beet Root, 90 Capsules (500 mg per Capsule)
Product 100 Brand 76
Flaxseed Oil, 1,000 mg, 120 Softgels
Flaxseed Oil, 1,000 mg, 120 Softgels
Product 100 Brand 76
Standardized Ashwagandha Extract, 60 Vegetarian Capsules (500 mg per Capsule)
Standardized Ashwagandha Extract, 60 Vegetarian Capsules (500 mg per Capsule)
Product 100 Brand 76
Horse Chestnut Extract, Standardized, 60 Vegetarian Capsules (300 mg per Capsules)
Horse Chestnut Extract, Standardized, 60 Vegetarian Capsules (300 mg per Capsules)
Product 100 Brand 76
Vitamin D3, 25 mcg (1000 IU), 250 Rapid Release Softgels
Vitamin D3, 25 mcg (1000 IU), 250 Rapid Release Softgels
Product 100 Brand 76
Vitamin D3, 50 mcg (2000 IU), 250 Softgels
Vitamin D3, 50 mcg (2000 IU), 250 Softgels
Product 100 Brand 76
CoQ10, 100 mg, 150 Capsules
CoQ10, 100 mg, 150 Capsules
Product 100 Brand 76
CoQ10, 200 mg, 120 Capsules
CoQ10, 200 mg, 120 Capsules
Product 100 Brand 76
Liquid Filled CoQ-10, 200 mg, 90 Rapid Release Softgels
Liquid Filled CoQ-10, 200 mg, 90 Rapid Release Softgels
Product 100 Brand 76
Liquid Filled CoQ-10, 100 mg, 90 Rapid Release Softgels
Liquid Filled CoQ-10, 100 mg, 90 Rapid Release Softgels
Product 100 Brand 76
Frequently Asked Questions
Is 21st Century a trustworthy supplement brand?

21st Century receives a brand trust score of 0/100 in GoodSupp's independent analysis. The company was founded in 1991 and is headquartered in Tempe, Arizona, United States. They hold 2 verified certifications including Consumerlab, Nsf Gmp. 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 2 verified third-party certifications: Consumerlab, Nsf Gmp. 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: Beet Root, 90 Capsules (500 mg per Capsule) (score: 100/100); Flaxseed Oil, 1,000 mg, 120 Softgels (score: 100/100); Standardized Ashwagandha Extract, 60 Vegetarian Capsules (500 mg per Capsule) (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 231 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. 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.