Here is what you do i call it the Lightweightbaby scam to get free NO2. GNC has this policy that you can return certain supplements even after you have used them. So you buy your NO2 at GNC take half of the NO2 out then you return it at another GNC and get your money back. Then you go to another GNC buy it and then take half out and return that. Pretty much you do it til you have the desired about u want. Call me cheap but GNC is a rip off.