For many years, experts at the famous Cleveland Clinic have used a special ultra low-calorie, protein-rich strategy to speed off excess pounds. Called a "protein-sparing modified fast," or PSMF diet, ...

Both low-carb and keto diets restrict how many carbohydrates you can consume per day, emphasizing high-protein foods and healthy fats instead. Keto is a more restrictive diet so it's often associated ...