If the master cleanse has taught me one thing, it's that we eat WAY too much food, or at least I do. I can easily get by with 1/2 of what I have ate in the past. Point proven, I am living on lemons and water, and feel mostly great.
My system has almost adjusted to a liquid diet, the hunger cravings are become less severe, and the "slow brain' syndrome is dissipating. If you want to start a cleanse, I would do it on a Friday, so you are relatively back to normal by the start of the next work week.
Day 3 - Weight 178. Even after 3 days my body is maintaining its weight.