This deal has ended.
Update: the deal is dead! The coupon has now expired. GNC is now taking $10 off their signature-brand Vitamins with coupon code ONLY4E. Available varieties include GNC Mega Men Sport, GNC Women's Ultra Mega Active, GNC Mega Men Heart, and several more (each includes 90 caplets). Shipping is free if you use Google Checkout ($3.62 otherwise) and sales tax is charged in states with GNC retail locations. This is a four-hour sale, which I'm guessing began at 12pm CDT, so it won't last long.