This diet fad is a complete hoax. In reality, our bodies were designed over hundreds of thousands of years to readily digest and thrive on a wide variety of foods and food mixtures. Beliefs that protein and carb or fat and carb foods don’t mix goes against both common sense and everything known about digestion. Besides, almost all foods (except added sugar, oils, and most fruits) are already a combination of carbs, protein, and fat. (A slice of bread contains 3 grams of fat, 16 grams of carbs, and 1 ½ grams of fat; a bowl of black beans is a nice combo of 15 grams protein, 41 grams carbs, and 1 gram fat; while even broccoli contains a little bit of all three nutrients.)