[Cloud9Fitness]

You got it. Shakes promote gastric emptying more than solid foods. Then once the simple sugars (dextrose=glucose, maltose= two glucoses) overwhelm the ability to absorb leaving a large amount of solute in your intestines (high osmotic pressure). All the molecules pull water into the intestines, then quickly move down the intestines. Similar events occur when people consume large amounts of sugar alcohols that can not be absorbed (splenda other sugar substitutes). If it can't be absorbed it will draw water into the intestines. Fiber works the same way, but may not be fully digested. A relatively smaller number of fiber molecules draw water into the stool in a more controlled fashion.