A smoothie is a beverage that is blended (with a blender) from whole pieces of fruit, vegetables, and other ingredients. The outcome is a nutrient rich, thick and filling shake. Juicing, on the other hand, involves a liquid extractor (juicer) that separates the juice and the pulp into different compartments. Juice is a thin and liquidy drink, that is also nutrient packed, but more hydrating than filling. One of the main advantages to blending, over juicing, is that blending maintains all parts of your ingredients, including fiber, which is essential for digestion.