Are you always wondering what you should put in your green smoothie? Here's a great guideline of what to add in your smoothies to get everything you need. You always want to make sure you have fiber, protein and fat in your smoothies so they will last longer. If it's just full of fruit then you will be hungry in an hour not to mention probably too much sugar. The protein and fat will help with satiety and allow the shake to last a little longer. The sweeteners are optional de