Today only, buy 2 GNC Supplements and get 2 free. Add 4 to your cart to see the discount. This saves as much as $260! They can be mixed and matched, with the freebies coming on the least expensive items. Shipping adds $5. This deal applies to supplements like Preventive Nutrition Pycnogenol (normally $64.99 apiece), Inositol Powder (16oz) (normally $129.99 each), and Triple Strength Fish Oil (regularly $21.99 each). Sales tax is charged in states with GNC retail locations.