Putting your body in starvation mode makes it think it needs to store fat when it gets the chance, so as soon as you start eating again, that's what it does. It changes your metabolism and it's hard to get it back to normal. Not to mention, starving yourself is hazardous to your health. Food is required for things like basic organ function. You can honestly lose more weight more comfortably and keep it off for longer by just eating right. Check out a book called the Fast Metabolism Diet, it explains everything and I have seen it work for many people.
When insulin is produced for no apparent purpose - for example, when we eat a large pizza late at night - the glucose (a form of sugar converted from carbohydrates) that prompts its release will be, in large part, transformed into glycogen (another form of sugar stored in the muscles and liver) and tucked away for future use. And this is where the problem lies. Once our body's capacity for glycogen storage has been reached (around 350 grams in most adults) any remaining will be converted into fat. For a well fed bodybuilder - especially one whose diet includes 40 percent of their total daily calories in the form of carbohydrates - this 350 gram limit will probably be maintained into the evening hours.
That’s because it theoretically causes a mild ketosis (yep, the basis of the keto diet), which is a fat-burning state that should make you feel less hungry. The key in being successful with a low-carb diet (especially if you’re used to a more high-carb lifestyle) is to compensate for those lost carbs with protein-rich foods, says Dr. Cheskin. That way, your volume of food stays the same, but you’re doing it healthfully rather than in a way that exacerbates your weight gain.