In the likely event that i will lose a considerable amt. of weight after my colonoscopy, will it be possible to keep some o it off with relative ease?

Probably not: Weight loss from fasting or clear liquid diets as well as colon cleansing vary dramatically among individuals. These days, in order to maximize the chances of a clean colon and good exam, endoscopists will recommend 2 or more days of clear liquids first. The resulting weight loss from all this might range from 3 to 7 pounds. But it's a LOT of water weight. Few experience permanent weight loss:)