I did try it some years ago, I remember getting to 6 days or so. I am an advocate foe a detox because I do believe we carry a lot of toxins in our system so in that respect a 7 to 10 cleanse is not a bad idea but I think any further then that is unhealthy. Trying to lose 45lbs. In 3 months is aggressive and may not be achieved in a matter that is healthy and sustainable. Plus that kind of rapid weight lost will keep a lot of sagging skin if you know what I mean. Start exercising 4 to 6 days a week, and not just cardio exercises do some weight/strength training exercises, mix it up. Also reduce your carbs, eliminate pasta, bread and rice and eat more nutritional carbs like fruit, veggies etc. Do some research on the healthy ones, eat every 3 to 4 hours and healthy snacks, nuts are good. And cut down on the sugar and salt...while doing the cleanse for the few days let you exercise only include a 30 minute or more walk because you don't want to be fainting. If possible try to cut out too much hormone infested foods like chicken and cow milk. Tough but this way your eating better, exercising and cleansing. I'm using P90X, hitting the gym, riding my bike and have been cutting out unhealthy foods.