Stephanie Gonot/Courtesy of the photographer Pagoto notes that multiple studies have compared diets that vary by how many carbs, protein grams and fat grams they require you to eat. “A lot of times, it’s a draw: No diet is better than the other,” she says in a video press release . “When a diet does outdo another diet in terms of weight loss, it’s by a very small amount.” (Not all obesity researchers would agree. As we’ve reported , one study published in the Journal of the American Medical Association in 2012 found that a low-carb diet was a clear winner over a low-fat diet and low-glycemic diet.) Enlarge image i The Hollywood or Grapefruit Diet: Followers eat half a grapefruit with every meal in the belief that enzymes in the fruit somehow magically break down fat (no, they don’t). It’s a low-carb diet that calls for lots of dietary fat and protein. Pass the bacon.