You will love this answer . . . Yes and No . . .
The real truth about "starvation mode" (although I can't say that I like the name) . . . This is one of the most misunderstood and misused terms around 3FC, (or in any weight-loss circle) unfotunately. Anyway . . .
It does exist (the YES) . . . if you
consistently deprive your body of the nutrients it requires to keep everything functioning, it will begin to conserve what you do give it for fear it is never going to get properly nourished again. For the average woman, a
consistent calorie level before 1200 is not recommended because below that level it is difficult to obtain the proper nutrients required for health. However . . . (and this is the NO) . . . notice that I've italicized a certain concept . . . one or two days of a lower level of calories is not going to put you into the infamous "starvation mode". If you are eating below 1200 calories all the time (or almost all the time) -- i.e.,
consistently, you could very well be harming your metabolism over the long haul. Eventually weight loss will slow down because your body has forced itself to learn to exist on fewer calories.
Additionally, the body can be inconsistent in how it uses energy and weight loss does not occur on a timetable. The body does become complacent sometimes, too. So shaking things up a little in either the calories-in or the calories-out areas can sometimes help. Usually, however, if you are eating at a sensible level, and exercising at a sensible level as well -- one that should be resulting in about a 500 to 1000 calorie deficit per day as compared to a sensible BMR level -- the weight will eventually move.
It may not move as quickly as it does for a non-diabetic, unfortunately, (nore as quickly as we would like it to) but move it will.