The deals are stacking up at GNC today! Are you in need of some vitamins, herbs, and natural remedies to help you through cold and flu season? Or, maybe you're short on your essential vitamins since you've been so busy getting ready for the holidays. Either way, GNC has you covered. Today and tomorrow, they're offering BOGO free on dozens of supplements to keep you healthy and strong. In order to make this deal even better, GNC is throwing in $1.99 flat rate shipping on any size order. Shop now because this offer expires tomorrow night, 12/20/2013.