I would like to know the answer to that too. I think I read somewhere that something was added to fat free yogurt that made it less desirable than low fat yogurt, it may have had something to do with an additive that raised the sugar level in the blood). I am not sure of this though. I will have to remember this thread by committing it to memory since the search function doesn't help in finding it. This is one example of why a search function for comments may be nice to have.