Today's offer on Groupon is for $100 worth of customized vitamins (NatureMade) for just $29 at VitaminID.com. You can go here and take a survey or call the toll-free number available to help you customize your daily vitamins. Or you can customize on your own.
To get in on the deal:
Go here to Groupon.
If you have not yet signed up, sign up!
Then choose Sioux Falls as your city (deal is good no matter where you live, since it is online)
Enter the request info and pay!