RightSize Smoothie is a meal replacement that contains a good amount of nutrients and offers a unique herbal appetite suppressant to back their tagline up – that it’s a “Hunger Smashing” shake. There are a variety of flavors offered and the smoothies have a pretty good taste to them, especially compared to other shakes that are out there right now. However, they use a soy protein isolate which, if you have not noticed by now, is not something we are crazy about. They also unfortunately use acesulfame potassium, which is an artificial sweetener. This is a good shake in the sense that it does help suppress the appetite and it is affordable compared to other similar products, but as it uses the two ingredients we discourage against, we just can’t rate RightSize as one of the best.