Not necessarily, the body shuts down. You need calories to fuel you metobolism. You need (your body weight X 9.8) calories to keep you metobolic rate at “normal”.
Your diet that you posted requires a 500 calorie per day limit. I agree that bodies do go into starvation mode but only in very certain situations and only if those situations have lasted for certain periods of time. I believe the starvation mode excuse is way overused these days!!!!
However, if you limit me to 500 calories per day and put me on an island for two months, when you come back, I will not be overweight :-) ...and I didn’t even need your HCG drops..
I already have the calories. They are in storage. I'm trying to move them out of storage and use them. I don't need to intake any more.
I went to Sapper school in November/December of last year and it taught me a lesson about eating. We eat way too much. When they starved me in the woods, I had energy to stay up for the 23 hours per day we were forced to stay awake and I never had the afternoon energy crash we suffer as regular soldiers or Americans. The great thing is that my weight (at 34 years old) returned to that of my high school days and I was very strong and energetic (after recovering from the frost bite, blisters, and all that comes from a very tough school in the Army).