A bun is made of flour which comes from the grain wheat, yeast and sugar. Smoothies do not have any grain, they have fruit, some dairy, ice and maybe some sweetener. If you eat the bun, you do get a lot of carbs and empty calories but that is it.
A bun is made of flour which comes from the grain wheat, yeast and sugar. Smoothies do not have any grain, they have fruit, some dairy, ice and maybe some sweetener. If you eat the bun, you do get a lot of carbs and empty calories but that is it.