You might be thinking to yourself, lettuce in a smoothie? That was my initial reaction. In reality, any green leafy vegetable can be blended into a smoothie.
As is the case with most greens, lettuce is a good option for anyone looking to lose weight because of its super low calorie count. 1 cup of lettuce contains about 8 calories. Lettuce has a high water content, but does offer varying health benefits depending on the type.