Information on GNC in Tiffin, OH 44883 Outlet Note Regular Brands GNC Ohio Tiffin 330222 Rating 4.7 based on 97 votes Address 530 West Market Street Tiffin, OH 44883 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 - Bowling Green GNC Outlet - Ada GNC Outlet - Amherst GNC Outlet - Ashland People Also Viewed