Thorne

Thorne receives a brand trust score of 98/100 in GoodSupp's independent analysis. The company was founded in 1984 and is headquartered in New York, NY, United States. They hold 10 verified certifications including Nsf Certified For Sport, Nsf Gmp, Fda Gmp Inspections, NSF Certified for Sport, NSF Contents Certified. These certifications are independently verified by GoodSupp and indicate the brand meets recognized quality, purity, and manufacturing standards. Note: Thorne has 2 historical regulatory incidents on record. These are factored into the overall trust score and are detailed in the violation history section above.

Yes. Thorne holds 10 verified third-party certifications: Nsf Certified For Sport, Nsf Gmp, Fda Gmp Inspections, NSF Certified for Sport, NSF Contents 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.

Based on GoodSupp's quality analysis, the highest-rated Thorne supplements are: Vitamin D3 (score: 100/100); L-Tyrosine (score: 100/100); 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.

Thorne is headquartered in New York, NY, United States. The company was founded in 1984. They currently offer 204 products in their supplement lineup. Their official website is thorne.com. Manufacturing location may differ from corporate headquarters — look for GMP certification to verify manufacturing quality standards.