Proliant Manufacturing Plant Proliant Health's ImmunoLin and NutraGammax are manufactured in a state-of-the-art, GMP environment. U.S.D.A. approved and U.S. sourced raw materials along with rigorous quality control provide the safety needed in the manufacturing of dietary supplement ingredients. Proliant - Boone Facility 2020 Lakewood Drive Boone, IA 50036