I haven't done a lot of research (as some others have done very well here), but it just makes good sense to me. Once your body gets used to being on a certain program, it seems as if it would adjust and get comfortable there.

A good example (and also a terrible one) would be the way that I actually GAINED all of my weight. I gained very quickly for a while eating a bunch of high fat, high carb, high calorie foods. I continued to eat this way for years, but haven't gained a pound in 3 years. (haven't lost any either. lol) I think that my body got used to eating this way and I just didn't gain the way that I did in the beggining. I think this is why you lose so much in the beginning of induction, also. Say, the first week or so. Your body hasn't adjusted to the sudden change in diet, so it just goes with the flow.

Of course, this is just my own personal experience and very UN-scientific explination. LOL.

~Angi~