The proper clarifying question would be: "work" for what? For weight loss? That's easy - you restrict your food intake - and you inevitably lose weight. read more
The Jello diet calls for eating nothing but the sugar-free Jello all day long for at least a week and in some cases for as long as two weeks. Depending on the flavor and the kind of Jello you choose, you get as low as 35 calories to 70 calories per serving. read more