Information on GNC in Warren, OH 44483 Outlet Note Regular Brands GNC Ohio Warren 330450 Rating 4.7 based on 97 votes Address 5001 Mahoning Avenue Warren, OH 44483 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 - Austintown GNC Outlet - Aurora GNC Outlet - Aurora GNC Outlet - Alliance People Also Viewed