EDIT: Actually, Black Noise, seeing as Anzat feed off the Force and have basically no metabolism to begin with, and because carbonite encasement restricts one's access to the Force, an Anzat frozen in carbonite would actually starve to death.
Boba Fett's wife was frozen for a couple decades and she came out pretty bad. Blind, severe memory loss and possible other unmentioned health effects. Unlike a stasis pod, carbonite doesn't take in organic matter into effect. Carbonite is a storage system for inanimate objects and tibanna gas. Someone frozen for an extremely long time would surely die from organ failure or some other grievous problem.