5. Whey Protein
Whey protein as a meal replacement is a great way to cut down on calories. On average, a scoop of chocolate whey protein contains about 20 grams of protein, 3 grams of fat, 15 carbohydrates, and 140 calories. By replacing one meal a day with whey protein, you can save yourself hundreds of calories. Drinking a whey shake before a meal can help prevent you from overeating and get full quicker.