When I was on the "after six" diet, I was very hopeful because I lost 3 pounds on the first week. To think that I was eating what I wanted and the volume of food is not an issue, that 3 pounds was big deal. However, the loss got smaller and smaller as time went by. Maybe with OMAD, the bar is raised to reach 5 pounds of loss on the first week. That is just my rough estimate since the volume of food intake will be drastically cut down.