You may have heard of a clear liquid diet, where you only drink water, tea ... These foods contain little to no fiber or protein, so they give your digestive system a break.

For instance, you are required to avoid food and drinks with red or purple food coloring for colonoscopies because it can be confused with blood, says Farrell. A clear liquid diet might make you ...

Use it for the protein-packed base of a smoothie, or as the liquid in pancakes, waffles, or other baked good recipes (though stay clear of rice milk, the worst dairy-free milk for baking).