Since founded in 1972, Progressive Laboratories has always focused helping people maximize their health potential through science-based natural medicine. Progressive Laboratories strives to apply the latest nutrition science to its products in order to create an innovative and diverse line of offerings that can help with a wide array of health concerns. To achieve this, PL uses the exact ingredient sources and forms that are used in the clinical studies it models its products after. Progressive Labs is committed to always using the best American, European, and quality-verified suppliers of key raw materials to guarantee safety and effectiveness.