Most meal replacement shakes contain 40 grams of protein, 25 grams of carbohydrates, and very little fat. Look for 'light' or 'for her' versions of these individually packaged shakes for fewer carbs and calories. For example, Lean Body for Her contains only 9 grams of carbohydrates, 1 gram of sugar, 3 grams of fiber, and no artificial sweeteners. Many light meal-replacement shakes come in single serve packets, making them easy to store in your desk drawer to take with you on the go.