There's a thread on this in the "Site and Technical Issues" forum. It will stop doing it after a week. I'm not sure if there's anything else you can do, other than going in and deleting it from the seven days it pre-posted. This is something a LOT of people hate, but this type of ad keeps showing up.
Probably the most effective thing to do long-term is contact Glucerna and tell them that you hate, hate, HATE that advertising scheme and you will NEVER buy their products because of it. Advertisers will stop doing it if it backfires.