General Nutrition Corporation GNC is a Pittsburgh, Pennsylvania based American viable trademark of health and nutrition related products, including multivitamins, minerals, herbs, sports nutrition, diet, energy products and supplements. Easy to swallow, GNC’s all products are naturally formulated in a more precise herbal influence which ensures you get full and maximized diet proteins for extensive build. Fish oils for more subtle heart and voluptuous products to lead a better vigorous life in a satisfied manner.