Everybody could probably benefit from a good colon cleanse...and it works while eating or fasting. The Ultimate Fast combines The Master Cleanse with the p&b Colon Cleanse and a parasite cleanse...here's the link:
People have success with it even with eating a less-than-optimal diet, but the 'cleaner' the diet, the better the results. I think it's a great way to start a healthier diet and lifestyle!