Yes but then your metabolism is damaged and your weight loss is stagnant. Most Bikini IFBBPro (The Best Bodybuilding Competition in the World) competition's coaches make their athletes eat less than 1000kcal for competition and ending up damaging the metabolism.

What can it do to your body?

hello.. any advise for a heavy smoker to reduce weight? stamina is totally out, managed to jog for about 30 minutes, both calf can last about 20 minutes then start to tense.. no chest pain during jog, long and fast pace step, easily out of breathe.. can last 8 minutes in futsal non stop moving but not in jogging. 

weight : 94.6kg,
height  : 174cm..

can go longer jog if not for both of my calf starts to tense, have to stop and walk..

only eat once a day, dinner at 8 or 9pm.. no breakfast, launch only with bread and flavored water.. lack of plain water.. 5-6 pieces per day for cigarette (plan to stop for good)