GNC, or General Nutrition Center, is a supplement and vitamin store located along Foothill Boulevard. It offers sports enhancers, vitamins, teas and other items to help those looking to improve performance or overall health. Items such as whey protein, cleansers, herbs and other supplements can be found. Accessories such as drink shakers, body fat calipers and measuring tape are also on hand. Credit cards are accepted and online shopping is available, with discounts for Gold Card holders. Parking is free in the attached lot.