Stock up on vitamins and supplements to get you through the bleak winter months with this deal at GNC . Today only, get 4 items for just $20 PLUS get $1.99 shipping on any order. Hundreds of items are included in this offer so there's something for everyone. Just click here to see the selection! The discount will appear in your cart. Beauty care, diet support, sports nutrition products, and vitamins & herbs . . . it's all here! This offer is only valid today, 01/17/2014, so shop now.