Have any of you tried this? Science has recently uncovered that fasting is actually quite good for you. If you have it in you to fast for 4ish days it triggers mechanisms in the body that rebuild and repair damaged parts of your immune system, which is obviously extremely good for you. Prolonged fasting 're-boots' immune system I also found out that a lot of what you'll hear about "starvation mode" is bogus. After 2-3 days your body goes into "muscle sparing mode" and gets all of its nutrients from fat. I was in decentish shape before I started, around 220 at 5'11 with a good amount of muscle. I decided to go pretty hardcore, and in 3 weeks I have dropped to 185 and retained my muscle. I haven't been in this good of shape in almost a decade. I am seriously astonished by how quickly the results came. It sucks, SUCKS to go 4-5 days without eating, but it was totally worth it.