There are a lot of things that you can do to when it comes to weight loss and a lot of them begin with the effort.
I use a Nutribullet because it is easy and it helps you digest all of the nutrients properly.
I use bananas that I have put into quart sized Ziploc bags and pressed flat and then I freeze them. The frozen bananas are better because they add to the chilled effect, rather then making the smoothie seem slimy.
I use Kefir, which is a liquid yogurt type of drink. Kefir contains a lot of active cultures, which help your digestion, by providing good bacteria that help fight off bad bacteria.
My Recipe using a NutriBullet and the largest size cup.