Based in Ogden, Utah, and with more than 35 years of success, the Trace Minerals Research brand (TMR) is an industry leading provider of ionic trace minerals. Since 2004, Trace Minerals has been GMP (Good Manufacturing Practices) Certified, which recognizes that the company distributes safe, high-quality products to consumers. The quality of their products is a direct result of the company’s research and development processes. They are always updating their formulas and improving their products as new research continues to uncover nutrients and foods that promote good health. Trace Minerals products at Swanson include Colloidal Silver, Greens Pak, Sea Minerals with Silver and more!