Thorne success is based on this simple concept - to provide the highest quality nutrients and botanicals in their purest form so patients experience the greatest benefit possible from their supplements. Thorne's Commitment to Purity is unparalleled. Thorne has become a benchmark by which other manufacturers are judged for product purity. That's why practitioners rely on Thorne as the company they can trust for their extremely allergic, chemically sensitive, and immune-compromised patients.