It's the low fat part of that diet that is the myth of medicine. In the 1950s there was an influential doctor (Keys) who had a hypothesis about a low fat, high carb diet being the way to prevent heart disease. Thing is, any time a study came along that didn't concur with those findings, it was dismissed. A classic case of confirmation bias was going on; in the 1960s a Senate committee used some of Keys' staff to write a report about a low fat diet and it became the thing that science then had to catch up to. But it never has. The bottom line - eat bacon. It's good for you (and butter and cream and meats with fat. Your brain is happier when those are in your diet.)

I have been meaning to go back to the Mosley program about fasting - because while it makes the point that the time of the fast is helpful, you can eat what you want (watching the calorie count on the off days).