Hello. At this time, the regular FitDay does not offer that; however, I believe the PC version allows you to set up to track a specific category of something, though it is likely you will have to enter it yourself; I'm not sure if this value is one built into the food nutrition. Anybody with PC know?
"If you drop an egg, you don't say, 'Oh, shoot' and drop the other 11, do you?"
-Source unknown, but obviously brilliant
Reached goal 4/16/2010...but kind of afraid to look these days