49. Special K
Sugar Per Serving: 4g
Watch A Classic Commercial: Youtube.com
Special K had a mild flavor, which made it ideal for adding our favorite fruit. And, if we're to believe the string of sexist commercials from the '70s and '80s (like the one above) it also serves as a great weight-loss tool. Their more recent marketing messages have improved only slightly, yet Special K still holds a special place in our hearts.