Information on GNC in Waltham, MA 02453 Outlet Note Regular Brands GNC Massachusetts Waltham 330437 Rating 4.7 based on 97 votes Address 80 River Street Waltham, MA 02453 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 - Brighton GNC Outlet - Cambridge GNC Outlet - Boston GNC Outlet - Boston People Also Viewed