General Nutrition Center 1246 Carl D Silver Pkwy, Fredericksburg, VA22401 GNC is an international company that sells nutritional products and has been in business for over 75 years. It…More maintains retail stores in over 4,800 locations throughout the country. These centers carry a wide array of products in categories such as vitamins and supplements, protein shakes and bars, cleansing and digestion, energy and endurance and herbs. Name brands carried include Force Factor, Muscle Tech, Cyto Sport, Gaspari Nutrition and Optimum Nutrition. Other items available are equipment and accessories, beauty care and even pet nutrition.