Mostly its a matter of will power. Its hard not eating, not so much because of hunger, but just missing the pleasure and the time spent eating. Many people cannot fast, others breeze through it. I had to do a series of 1-5 days fasts before I could go the entire 10 days. With a Bowel Cleanse
you do not have to fast. In fact, you can use your colon cleansing time as a period to begin a healthy eating lifestyle. The cleaner you are when you begin Master Cleanse, or any other fast, than to fast for a week or so.