I'm not sure about the exact specifics of your diet, but it has been shown for a lot of organisms that if you intentionally starve them they will live noticeably longer. It's almost like clockwork. Yeast cells for example, if starved 30% of their normal nutritional intake, live 30% longer. Same principle has also been demonstrated on a lot of mammals.
That's what I said. Calories are not the only thing that matters when it comes to health impact between two diets with different kinds of foods, but once you drop beneath 1,000 calories a day, it doesen't matter what you eat since the effect of such a low calorie intake on activating DNA-repair enzymes and antioxidant gene activity is so strong that it compensates for whatever it is that you are eating. A guy who eats 500 calories a day of butter will live longer and be healthier than a guy who eats 3,000 calories a day of chicken breasts, brown rice and broccoli. Now the guy who eats 3,000 calories a day of the aforementioned foods will have much better health and longevity than the guy who eats 3,000 calories a day of butter. Calories are not the only thing that matter on diets above 1,000 calories a day(99% of all diets), but they are the only thing that matters when calories drop to below 1,000 calories a day.
SUCKMYMUSCLE