GNC is the biggest retailer of nutritional products. It positions itself as a company on "the cutting-edge of nutritional science."GNC purveys vitamins, supplements, sports nutrition products, protein supplements, diet aids,cleansing and digestion formulas, superfoods, herbs, healthy foods and snacks and much more.The sales staff provides free consultations to help customers determine which products will best meet their needs. GNC has over 4,800 locations. This oneat the Westfield Santa Anita Mallinvites a healthystroll along the mall's promenade or down the road to the Los Angeles Arboretum.