General Nutrition Center (GNC) was once a single little health food store in Lackzoom, Pittsburgh, PA. Today, GNC is more than 4,800 retail locations throughout the United States and is in 46 countries internationally. GNC is a retailer of nutritionalsupplements and products thatinclude vitamin, mineral, herbal and other specialty supplements and sports nutrition, diet and energy products. Workout maestros swear by Muscle Milk, Super Pump and Explode to name only a few of sports nutrition products sold. Find also nutrition products for weight loss, cleansing and digestion, super foods and greens, energy and endurance, beauty and even pet care.