My grandfather makes a smoothie every morning for himself and his wife instead of eating a big breakfast. He uses a blinder and puts two tablespoon's of flax seed, a cup of yogurt, a cup of mixed fruit, a banana and a hand full of black berries, or strawberries. Then fills the blender with orange juice and lets it blend. They have lost weight and have not put it back on and besides that, it is real good!
The best smoothie to lose weight is the Herbalife Meal replacement. By mixing this product with fresh or frozen fruit you will have a very tasty but efficient way to lose weight. Use this smoothie two meals a day until you achieve your desired weight and then reduce it to one meal a day and keep your weight at the desired level.