Tom, if you only had blast or a liquid diet over a period of time your digestive system would forget how to digest food in its normally chunky condition when chewed and you would have stomach cramps and maybe diarrhea. It would take a few days or even a week or more for your body to adjust. Its never good to go right back to solid foods after a lengthy period on just liquids. If you had liquids 75% of the time you might not have that problem, not sure. However, your digestive system would get lazy and not function as well. Healthy wishes, Wally Bishop C.N.C.