Pfft... one week. You'd never know it to look at me, but I lived for 2 months on one bag of potato chips and tap water. (College is fun isn't it?) It sucked horribly. I wouldn't recommend it. No energy, atrophy, clouded vision, delusions, other unpleasant symptoms... not at all fun. Worst of all, it was completely ineffective and probably permanently screwed up my metabolism.
If you insist on doing this, drink lots of water. You can go without food for a relatively long time, but without water you will die after only a few days.
If you insist on doing this, drink lots of water. You can go without food for a relatively long time, but without water you will die after only a few days.