There are a lot of factors that play a roll in weight loss but your overall caloric intake and energy expenditure are key. Green smoothies can be helpful as convenient, calorie-controlled meal replacements, if they keep you satisfied and you enjoy them.u003cbr/u003eu003cbr/u003eThis smoothie is nutritionally well-balanced and under 500 calories, so it could be used to replace a meal. However, if you're enjoying it outside of meals and weight loss is a goal, I'd suggest making it into 2 servings or omitting the nut butter to reduce the overall calories.