However, fruit smoothies are definitely not a good choice for breakfast, especially if you are trying to lose weight. It all has to do with blending the fruit.
Whole fruits are one of the healthiest things that you can eat. They are loaded with vitamins, minerals, fiber, antioxidants and other biologically active phytochemicals. They are easy on the blood sugar because each sugar molecule is surrounded by a helix of fiber. This takes time for your digestive system to break down and results in an easy, gradual rise in blood sugar and a small release of insulin.
When you blend fruit, you upset this healthy, natural package. Blending fruit separates the fiber from the sugar. This results in a higher spike in blood sugar and insulin, which has the potential to increase fat storage, decrease fat burning at the muscular level, and increase hunger a few hours later, which leads to snacking.
If weight loss is your goal, eat your fruit in its whole, natural form and never blend it.