Information on GNC in Altoona, PA 16601 Outlet Note Regular Brands GNC Pennsylvania Altoona 325153 Rating 4.7 based on 97 votes Address 600 Chestnut Avenue Altoona, PA 16601 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 - Altoona GNC Outlet - Altoona GNC Outlet - Bellefonte GNC Outlet - Belle Vernon People Also Viewed