starving yourself, how long can you go without eating anything.?

Hi im going to put my body into state of ketosis and eat nothing at all and only drink water for 4 weeks solid. Stupid i know and probably bad for me in the long term but i want tolose 3-4 stones in 5 weeks. I will only drink water. Does anyone have any links to websites for starving yourself. I am going to consume vitamins and minerals. I am male aged 25 and i am 5ft 11inches. I believe i will be able to lose this weight as i lost 3 stone in 4 weeks on Cambridge diet/lighterlife programme but simply cant afford to keep it going. I know i should eat less, exercise more etc etc but i can starve myself and dont feel hungry, could i possibly go from 18st to 14st by starving myself. I know starving is stupid but im doing it regardless, just need to know the safest way. Once imin ketosis i will continue to burn fat. Does anyone thinki will be able to do it. I have read alot on ketosis and this is what im going to do. Eatin is all in he mind. I want o lose this weight for xmas.

Bad Idea. Bad bad bad.

You want to loose weight for christmas cut down on what you eat. Starving yourself you will just lose muscle mass.

you will end up looking a state.

Your life, but if you must do this see your doctor and get monitored as it goes on. please.

Simeons hCG diet protocol and ketosis.