I have fasted a couple of times in the past (several days each, first day only rice and veggies, 2nd broth and veggie juice, 3rd day just water, then reversed out of it same way) until I found a program that really works for me (and my husband). It's from a book called Clean written by a cardiologist in New York. Basically, it's an elimination diet for several days, then for three weeks you continue the elimination diet but only have one solid meal per day - preferably lunch - and for breakfast and dinner you have liquid meals (smoothies, soups). On the general Clean website you see they sell shake mixes and supplements - forget about that, just get the book from Amazon and make all your food yourself. Then log in in for even more ideas and support: http://my.cleanprogram.com/. I was amazed how many new and yummy recipes I came up with and often eat 'Clean' meals even when I am not doing the Clean program. So during the three weeks you have an extended daily fast since you only eat one solid meal per day. One of the important concepts is that if you have your last meal of the day at 7 pm, then you don't eat again until 7 am to give your digestive system a full 12 hours to do it's detox work. This is something we try to follow all the time now, and we have both lost a significant amount of weight since the first time we did the Clean cleansing diet, and kept if off (even though Clean isn't a weight loss diet, it's basically a detoxifying diet - but less aggressive than fasting - it rebalances your system, helping your digestive system do it's work better). We plan on doing the full Cleanse only two times a year (Fall and Spring), but can do mini ones after a time of indulgence (holidays, etc.). Sorry so long, but as you can see I am enthusiastic about it because it works great, we didn't feel very deprived during the cleanse, and so want to share!