All-Fruit Smoothies "Premade fruit smoothies sold at grocery and convenience stores are usually loaded with sugar. Drinking one or two of these smoothies per day could sabotage your weight-loss efforts," Jillian said. "To avoid the sugar shock, make your own smoothie at home. Stick to one cup of fruit then add in greens and a protein source like protein powder, and mix with unsweetened almond milk for a nutritious and delicious alternative to store-bought smoothies."