I'm just wondering...have you been talking to anybody that works for GNC? They really like to push the MRI stuff, because MRI pays them comissions. If you are deadset on a "pump" product, you should try one of the pre-workout drinks (IMO). Salespeople would love for you to think that NO2 (by MRI) or NANOX9 (by Muscletech) give you better pumps than NO-Xplode or Nitrix (both by BSN); because MRI and Muscletech pay them like 4 to 6 bucks per bottle they sell, while BSN doesn't pay anything. The reason why I'm responding to your MRI questions yet again isn't because I hate MRI or GNC (even though I do, lol). I just don't want you to get suckered out of your money like I did at your age.