GNC Customer Care service, Toll-Free Phone number, Postal Address, Social profiles, Email- GNC is an online company which manufactures healthcare and wellness products. This is one of the main leading companies in United States. The company was founded in 1935 and is headquartered in Pittsburgh, Pennsylvania. It offers protein, performance supplements, weight management supplements, vitamins, herbs, wellness supplements, health and beauty, food and drink etc. Our Enquiry team provides you all possible ways to contact this healthcare company.