My requirements for a diet: It should be simple. It should be guaranteed to work. And modern doctors should hate it. My diet: I have a target weight, what I should weigh. At the beginning of every week, I start a zero-calorie fast that doesn't end until I reach my target weight. I usually fast 2 or 3 days each week, but it varies from 1 to 5 days at extremes. The rest of the week I eat whatever I want. All requirements met.