Information on GNC in Ashtabula, OH 44004 Outlet Note Regular Brands GNC Ohio Ashtabula 325249 Rating 4.7 based on 97 votes Address 1115 West Prospect Avenue Ashtabula, OH 44004 Phone Hours may vary in different stores. For accurate hours, please contact each store directly. Suite643 Hours may vary in different stores. For accurate hours, please contact each store directly. Nearby GNC Outlet GNC Outlet - Ashtabula GNC Outlet - Ashtabula GNC Outlet - Beachwood GNC Outlet - Aurora People Also Viewed